33890725 has 12 divisors (see below), whose sum is σ = 45845280. Its totient is φ = 24647600.

The previous prime is 33890711. The next prime is 33890729. The reversal of 33890725 is 52709833.

It is not a de Polignac number, because 33890725 - 2⁵ = 33890693 is a prime.

It is a super-2 number, since 2×33890725² = 2297162482051250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33890729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61345 + ... + 61894.

It is an arithmetic number, because the mean of its divisors is an integer number (3820440).

Almost surely, 2^33890725 is an apocalyptic number.

It is an amenable number.

33890725 is a deficient number, since it is larger than the sum of its proper divisors (11954555).

33890725 is a wasteful number, since it uses less digits than its factorization.

33890725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123260 (or 123255 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 33890725 is about 5821.5740998462. The cubic root of 33890725 is about 323.6137404062.

The spelling of 33890725 in words is "thirty-three million, eight hundred ninety thousand, seven hundred twenty-five".