28722032064 has 84 divisors (see below), whose sum is σ = 89810767800. Its totient is φ = 8703644160.

The previous prime is 28722031993. The next prime is 28722032099. The reversal of 28722032064 is 46023022782.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2260239 + ... + 2272910.

Almost surely, 2^28722032064 is an apocalyptic number.

28722032064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28722032064 is an abundant number, since it is smaller than the sum of its proper divisors (61088735736).

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

28722032064 is a wasteful number, since it uses less digits than its factorization.

28722032064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4533178 (or 4533165 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 28722032064 in words is "twenty-eight billion, seven hundred twenty-two million, thirty-two thousand, sixty-four".