33121628 has 6 divisors (see below), whose sum is σ = 57962856. Its totient is φ = 16560812.

The previous prime is 33121591. The next prime is 33121639. The reversal of 33121628 is 82612133.

It is a junction number, because it is equal to n+sod(n) for n = 33121597 and 33121606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4140200 + ... + 4140207.

It is an arithmetic number, because the mean of its divisors is an integer number (9660476).

Almost surely, 2^33121628 is an apocalyptic number.

It is an amenable number.

33121628 is a deficient number, since it is larger than the sum of its proper divisors (24841228).

33121628 is a wasteful number, since it uses less digits than its factorization.

33121628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8280411 (or 8280409 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 33121628 is about 5755.1392685147. The cubic root of 33121628 is about 321.1470165037.

The spelling of 33121628 in words is "thirty-three million, one hundred twenty-one thousand, six hundred twenty-eight".