20116728 has 32 divisors (see below), whose sum is σ = 55880400. Its totient is φ = 6705504.

The previous prime is 20116727. The next prime is 20116739. The reversal of 20116728 is 82761102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20116721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46351 + ... + 46782.

Almost surely, 2^20116728 is an apocalyptic number.

It is an amenable number.

20116728 is an abundant number, since it is smaller than the sum of its proper divisors (35763672).

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

20116728 is a wasteful number, since it uses less digits than its factorization.

20116728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93148 (or 93138 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 20116728 is about 4485.1675553986. The cubic root of 20116728 is about 271.9688185132.

The spelling of 20116728 in words is "twenty million, one hundred sixteen thousand, seven hundred twenty-eight".