28790393968 has 30 divisors (see below), whose sum is σ = 63754134504. Its totient is φ = 12337970688.

The previous prime is 28790393963. The next prime is 28790393999. The reversal of 28790393968 is 86939309782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28790393963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1787680 + ... + 1803712.

Almost surely, 2^28790393968 is an apocalyptic number.

28790393968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28790393968 is an abundant number, since it is smaller than the sum of its proper divisors (34963740536).

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

28790393968 is an frugal number, since it uses more digits than its factorization.

28790393968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32081 (or 16042 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 64.

The spelling of 28790393968 in words is "twenty-eight billion, seven hundred ninety million, three hundred ninety-three thousand, nine hundred sixty-eight".