28500945 has 48 divisors (see below), whose sum is σ = 51480576. Its totient is φ = 13446400.

The previous prime is 28500919. The next prime is 28500991. The reversal of 28500945 is 54900582.

It is not a de Polignac number, because 28500945 - 2¹² = 28496849 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74224 + ... + 74606.

It is an arithmetic number, because the mean of its divisors is an integer number (1072512).

Almost surely, 2^28500945 is an apocalyptic number.

It is an amenable number.

28500945 is a deficient number, since it is larger than the sum of its proper divisors (22979631).

28500945 is a wasteful number, since it uses less digits than its factorization.

28500945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 28500945 is about 5338.6276326412. The cubic root of 28500945 is about 305.4591132669.

The spelling of 28500945 in words is "twenty-eight million, five hundred thousand, nine hundred forty-five".