33428425 has 12 divisors (see below), whose sum is σ = 42235020. Its totient is φ = 26237120.

The previous prime is 33428399. The next prime is 33428441. The reversal of 33428425 is 52482433.

It can be written as a sum of positive squares in 6 ways, for example, as 2913849 + 30514576 = 1707^2 + 5524^2 .

It is not a de Polignac number, because 33428425 - 2⁹ = 33427913 is a prime.

It is a super-2 number, since 2×33428425² = 2234919195961250, which contains 22 as substring.

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, 11290 + ... + 13939.

It is an arithmetic number, because the mean of its divisors is an integer number (3519585).

Almost surely, 2^33428425 is an apocalyptic number.

It is an amenable number.

33428425 is a deficient number, since it is larger than the sum of its proper divisors (8806595).

33428425 is a wasteful number, since it uses less digits than its factorization.

33428425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25292 (or 25287 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 33428425 is about 5781.7320069336. The cubic root of 33428425 is about 322.1355376325.

The spelling of 33428425 in words is "thirty-three million, four hundred twenty-eight thousand, four hundred twenty-five".