7942900 has 54 divisors (see below), whose sum is σ = 20062518. Its totient is φ = 2721600.

The previous prime is 7942867. The next prime is 7942903. The reversal of 7942900 is 92497.

It can be written as a sum of positive squares in 3 ways, for example, as 1162084 + 6780816 = 1078^2 + 2604^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7942903) 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 17 ways as a sum of consecutive naturals, for example, 4090 + ... + 5710.

Almost surely, 2^7942900 is an apocalyptic number.

7942900 is a gapful number since it is divisible by the number (70) 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 7942900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10031259).

7942900 is an abundant number, since it is smaller than the sum of its proper divisors (12119618).

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

7942900 is a wasteful number, since it uses less digits than its factorization.

7942900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649 (or 1635 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 7942900 is about 2818.3150994876. The cubic root of 7942900 is about 199.5230300693.

The spelling of 7942900 in words is "seven million, nine hundred forty-two thousand, nine hundred".