28101924 has 48 divisors (see below), whose sum is σ = 73158400. Its totient is φ = 9328608.

The previous prime is 28101917. The next prime is 28101943. The reversal of 28101924 is 42910182.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39282 + ... + 39990.

Almost surely, 2^28101924 is an apocalyptic number.

It is an amenable number.

28101924 is an abundant number, since it is smaller than the sum of its proper divisors (45056476).

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

28101924 is a wasteful number, since it uses less digits than its factorization.

28101924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089 (or 1081 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 28101924 is about 5301.1247863071. The cubic root of 28101924 is about 304.0269049364.

The spelling of 28101924 in words is "twenty-eight million, one hundred one thousand, nine hundred twenty-four".