33444428 has 12 divisors (see below), whose sum is σ = 58609992. Its totient is φ = 16698720.

The previous prime is 33444421. The next prime is 33444449. The reversal of 33444428 is 82444433.

It is a super-2 number, since 2×33444428² = 2237059528494368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33444394 and 33444403.

It is not an unprimeable number, because it can be changed into a prime (33444421) 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, 2450 + ... + 8537.

It is an arithmetic number, because the mean of its divisors is an integer number (4884166).

Almost surely, 2^33444428 is an apocalyptic number.

It is an amenable number.

33444428 is a deficient number, since it is larger than the sum of its proper divisors (25165564).

33444428 is a wasteful number, since it uses less digits than its factorization.

33444428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11752 (or 11750 counting only the distinct ones).

The product of its digits is 36864, while the sum is 32.

The square root of 33444428 is about 5783.1157692026. The cubic root of 33444428 is about 322.1869341371.

The spelling of 33444428 in words is "thirty-three million, four hundred forty-four thousand, four hundred twenty-eight".