28725396 has 48 divisors (see below), whose sum is σ = 76863360. Its totient is φ = 8179200.

The previous prime is 28725377. The next prime is 28725401. The reversal of 28725396 is 69352782.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47496 + ... + 48096.

It is an arithmetic number, because the mean of its divisors is an integer number (1601320).

Almost surely, 2^28725396 is an apocalyptic number.

It is an amenable number.

28725396 is an abundant number, since it is smaller than the sum of its proper divisors (48137964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28725396 is a wasteful number, since it uses less digits than its factorization.

28725396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184 (or 1182 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 28725396 is about 5359.6078214735. The cubic root of 28725396 is about 306.2588693253.

The spelling of 28725396 in words is "twenty-eight million, seven hundred twenty-five thousand, three hundred ninety-six".