304156820640 has 384 divisors, whose sum is σ = 996091229952. Its totient is φ = 77960314880.

The previous prime is 304156820629. The next prime is 304156820647. The reversal of 304156820640 is 46028651403.

It is a super-2 number, since 2×304156820640² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (304156820647) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 518154427 + ... + 518155013.

It is an arithmetic number, because the mean of its divisors is an integer number (2593987578).

Almost surely, 2^304156820640 is an apocalyptic number.

304156820640 is a gapful number since it is divisible by the number (30) 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 304156820640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498045614976).

304156820640 is an abundant number, since it is smaller than the sum of its proper divisors (691934409312).

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

304156820640 is a wasteful number, since it uses less digits than its factorization.

304156820640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 304156820640 in words is "three hundred four billion, one hundred fifty-six million, eight hundred twenty thousand, six hundred forty".