20750928 has 40 divisors (see below), whose sum is σ = 58481376. Its totient is φ = 6288000.

The previous prime is 20750927. The next prime is 20750953. The reversal of 20750928 is 82905702.

It is a super-2 number, since 2×20750928² = 861202025722368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20750927) 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, 19123 + ... + 20178.

Almost surely, 2^20750928 is an apocalyptic number.

It is an amenable number.

20750928 is an abundant number, since it is smaller than the sum of its proper divisors (37730448).

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

20750928 is a wasteful number, since it uses less digits than its factorization.

20750928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39323 (or 39317 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 20750928 is about 4555.3186496666. The cubic root of 20750928 is about 274.7973294597.

The spelling of 20750928 in words is "twenty million, seven hundred fifty thousand, nine hundred twenty-eight".