28768732990 has 8 divisors (see below), whose sum is σ = 51783719400. Its totient is φ = 11507493192.

The previous prime is 28768732939. The next prime is 28768732991. The reversal of 28768732990 is 9923786782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28768732991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1438436640 + ... + 1438436659.

It is an arithmetic number, because the mean of its divisors is an integer number (6472964925).

Almost surely, 2^28768732990 is an apocalyptic number.

28768732990 is a deficient number, since it is larger than the sum of its proper divisors (23014986410).

28768732990 is a wasteful number, since it uses less digits than its factorization.

28768732990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2876873306.

The product of its (nonzero) digits is 18289152, while the sum is 61.

The spelling of 28768732990 in words is "twenty-eight billion, seven hundred sixty-eight million, seven hundred thirty-two thousand, nine hundred ninety".