28161797304 has 32 divisors (see below), whose sum is σ = 74545935120. Its totient is φ = 8835073536.

The previous prime is 28161797303. The next prime is 28161797327. The reversal of 28161797304 is 40379716182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28161797303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34511599 + ... + 34512414.

Almost surely, 2^28161797304 is an apocalyptic number.

28161797304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28161797304 is an abundant number, since it is smaller than the sum of its proper divisors (46384137816).

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

28161797304 is a wasteful number, since it uses less digits than its factorization.

28161797304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69024039 (or 69024035 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The spelling of 28161797304 in words is "twenty-eight billion, one hundred sixty-one million, seven hundred ninety-seven thousand, three hundred four".