7351806840 has 128 divisors (see below), whose sum is σ = 25316928000. Its totient is φ = 1673031168.

The previous prime is 7351806823. The next prime is 7351806851. The reversal of 7351806840 is 486081537.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 7351806792 and 7351806801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173251 + ... + 211469.

It is an arithmetic number, because the mean of its divisors is an integer number (197788500).

Almost surely, 2^7351806840 is an apocalyptic number.

7351806840 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 7351806840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12658464000).

7351806840 is an abundant number, since it is smaller than the sum of its proper divisors (17965121160).

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

7351806840 is a wasteful number, since it uses less digits than its factorization.

7351806840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38469 (or 38465 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 7351806840 is about 85742.6780547470. The cubic root of 7351806840 is about 1944.4555931467.

The spelling of 7351806840 in words is "seven billion, three hundred fifty-one million, eight hundred six thousand, eight hundred forty".