28413925 has 6 divisors (see below), whose sum is σ = 35233298. Its totient is φ = 22731120.

The previous prime is 28413899. The next prime is 28413929. The reversal of 28413925 is 52931482.

It can be written as a sum of positive squares in 3 ways, for example, as 1196836 + 27217089 = 1094^2 + 5217^2 .

It is not a de Polignac number, because 28413925 - 2¹³ = 28405733 is a prime.

It is a super-2 number, since 2×28413925² = 1614702267811250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28413929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 568254 + ... + 568303.

Almost surely, 2^28413925 is an apocalyptic number.

28413925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28413925 is a deficient number, since it is larger than the sum of its proper divisors (6819373).

28413925 is a wasteful number, since it uses less digits than its factorization.

28413925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136567 (or 1136562 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 28413925 is about 5330.4713675246. The cubic root of 28413925 is about 305.1479171443.

The spelling of 28413925 in words is "twenty-eight million, four hundred thirteen thousand, nine hundred twenty-five".