28694725 has 24 divisors (see below), whose sum is σ = 38086848. Its totient is φ = 21369600.

The previous prime is 28694719. The next prime is 28694737. The reversal of 28694725 is 52749682.

It is not a de Polignac number, because 28694725 - 2⁷ = 28694597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45160 + ... + 45790.

It is an arithmetic number, because the mean of its divisors is an integer number (1586952).

Almost surely, 2^28694725 is an apocalyptic number.

28694725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28694725 is a deficient number, since it is larger than the sum of its proper divisors (9392123).

28694725 is a wasteful number, since it uses less digits than its factorization.

28694725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765 (or 760 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 28694725 is about 5356.7457471864. The cubic root of 28694725 is about 306.1498297965.

The spelling of 28694725 in words is "twenty-eight million, six hundred ninety-four thousand, seven hundred twenty-five".