33390725 has 12 divisors (see below), whose sum is σ = 41573604. Its totient is φ = 26603520.

The previous prime is 33390697. The next prime is 33390739. The reversal of 33390725 is 52709333.

It can be written as a sum of positive squares in 6 ways, for example, as 923521 + 32467204 = 961^2 + 5698^2 .

It is a de Polignac number, because none of the positive numbers 2^k-33390725 is a prime.

It is a super-2 number, since 2×33390725² = 2229881032051250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33390691 and 33390700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3827 + ... + 9023.

It is an arithmetic number, because the mean of its divisors is an integer number (3464467).

Almost surely, 2^33390725 is an apocalyptic number.

It is an amenable number.

33390725 is a deficient number, since it is larger than the sum of its proper divisors (8182879).

33390725 is a wasteful number, since it uses less digits than its factorization.

33390725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5464 (or 5459 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 32.

The square root of 33390725 is about 5778.4708184778. The cubic root of 33390725 is about 322.0143924485.

The spelling of 33390725 in words is "thirty-three million, three hundred ninety thousand, seven hundred twenty-five".