20728088 has 64 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 9210240.

The previous prime is 20728087. The next prime is 20728093. The reversal of 20728088 is 88082702.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20728087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249695 + ... + 249777.

It is an arithmetic number, because the mean of its divisors is an integer number (680400).

Almost surely, 2^20728088 is an apocalyptic number.

It is an amenable number.

20728088 is an abundant number, since it is smaller than the sum of its proper divisors (22817512).

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

20728088 is a wasteful number, since it uses less digits than its factorization.

20728088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 20728088 is about 4552.8109998110. The cubic root of 20728088 is about 274.6964717188.

The spelling of 20728088 in words is "twenty million, seven hundred twenty-eight thousand, eighty-eight".