87745428 has 36 divisors (see below), whose sum is σ = 226524480. Its totient is φ = 28625616.

The previous prime is 87745417. The next prime is 87745447. The reversal of 87745428 is 82454778.

It is a tau number, because it is divible by the number of its divisors (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, 24238 + ... + 27621.

Almost surely, 2^87745428 is an apocalyptic number.

It is an amenable number.

87745428 is an abundant number, since it is smaller than the sum of its proper divisors (138779052).

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

87745428 is a wasteful number, since it uses less digits than its factorization.

87745428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51916 (or 51911 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 87745428 is about 9367.2529591124. The cubic root of 87745428 is about 444.3666924450.

The spelling of 87745428 in words is "eighty-seven million, seven hundred forty-five thousand, four hundred twenty-eight".