28951778032 has 20 divisors (see below), whose sum is σ = 57013646776. Its totient is φ = 14238578880.

The previous prime is 28951777961. The next prime is 28951778041. The reversal of 28951778032 is 23087715982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14830878 + ... + 14832829.

Almost surely, 2^28951778032 is an apocalyptic number.

It is an amenable number.

28951778032 is a deficient number, since it is larger than the sum of its proper divisors (28061868744).

28951778032 is a wasteful number, since it uses less digits than its factorization.

28951778032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29663776 (or 29663770 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 28951778032 in words is "twenty-eight billion, nine hundred fifty-one million, seven hundred seventy-eight thousand, thirty-two".