33721090 has 32 divisors (see below), whose sum is σ = 66769920. Its totient is φ = 12183744.

The previous prime is 33721069. The next prime is 33721117. The reversal of 33721090 is 9012733.

It is a super-2 number, since 2×33721090² = 2274223821576200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3351 + ... + 8869.

It is an arithmetic number, because the mean of its divisors is an integer number (2086560).

Almost surely, 2^33721090 is an apocalyptic number.

33721090 is a deficient number, since it is larger than the sum of its proper divisors (33048830).

33721090 is a wasteful number, since it uses less digits than its factorization.

33721090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5586.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 33721090 is about 5806.9863096102. The cubic root of 33721090 is about 323.0729035054.

The spelling of 33721090 in words is "thirty-three million, seven hundred twenty-one thousand, ninety".