28502901 has 32 divisors (see below), whose sum is σ = 48537600. Its totient is φ = 16193520.

The previous prime is 28502893. The next prime is 28502933. The reversal of 28502901 is 10920582.

It is not a de Polignac number, because 28502901 - 2³ = 28502893 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28502941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44856 + ... + 45486.

It is an arithmetic number, because the mean of its divisors is an integer number (1516800).

Almost surely, 2^28502901 is an apocalyptic number.

28502901 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28502901 is a deficient number, since it is larger than the sum of its proper divisors (20034699).

28502901 is a wasteful number, since it uses less digits than its factorization.

28502901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886 (or 880 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 28502901 is about 5338.8108226458. The cubic root of 28502901 is about 305.4661009224.

It can be divided in two parts, 28502 and 901, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 28502901 in words is "twenty-eight million, five hundred two thousand, nine hundred one".