28715445 has 64 divisors (see below), whose sum is σ = 56782080. Its totient is φ = 13651200.

The previous prime is 28715437. The next prime is 28715471. The reversal of 28715445 is 54451782.

It is not a de Polignac number, because 28715445 - 2³ = 28715437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 90427 + ... + 90743.

It is an arithmetic number, because the mean of its divisors is an integer number (887220).

Almost surely, 2^28715445 is an apocalyptic number.

It is an amenable number.

28715445 is a deficient number, since it is larger than the sum of its proper divisors (28066635).

28715445 is a wasteful number, since it uses less digits than its factorization.

28715445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 397 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 28715445 is about 5358.6794082124. The cubic root of 28715445 is about 306.2235006920.

The spelling of 28715445 in words is "twenty-eight million, seven hundred fifteen thousand, four hundred forty-five".