33725428 has 12 divisors (see below), whose sum is σ = 64384992. Its totient is φ = 15329720.

The previous prime is 33725423. The next prime is 33725449. The reversal of 33725428 is 82452733.

It is a super-2 number, since 2×33725428² = 2274808987566368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33725393 and 33725402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33725423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383200 + ... + 383287.

It is an arithmetic number, because the mean of its divisors is an integer number (5365416).

Almost surely, 2^33725428 is an apocalyptic number.

It is an amenable number.

33725428 is a deficient number, since it is larger than the sum of its proper divisors (30659564).

33725428 is a wasteful number, since it uses less digits than its factorization.

33725428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766502 (or 766500 counting only the distinct ones).

The product of its digits is 40320, while the sum is 34.

The square root of 33725428 is about 5807.3598132026. The cubic root of 33725428 is about 323.0867566575.

The spelling of 33725428 in words is "thirty-three million, seven hundred twenty-five thousand, four hundred twenty-eight".