7812042804 has 72 divisors (see below), whose sum is σ = 20321545608. Its totient is φ = 2528547840.

The previous prime is 7812042803. The next prime is 7812042817. The reversal of 7812042804 is 4082402187.

It can be written as a sum of positive squares in 4 ways, for example, as 3269552400 + 4542490404 = 57180^2 + 67398^2 .

It is a super-2 number, since 2×7812042804² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7812042803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 688344 + ... + 699600.

It is an arithmetic number, because the mean of its divisors is an integer number (282243689).

Almost surely, 2^7812042804 is an apocalyptic number.

7812042804 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7812042804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10160772804).

7812042804 is an abundant number, since it is smaller than the sum of its proper divisors (12509502804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7812042804 is a wasteful number, since it uses less digits than its factorization.

7812042804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11825 (or 11820 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 7812042804 is about 88385.7613193437. The cubic root of 7812042804 is about 1984.2126073566.

The spelling of 7812042804 in words is "seven billion, eight hundred twelve million, forty-two thousand, eight hundred four".