33172890 has 32 divisors (see below), whose sum is σ = 80628480. Its totient is φ = 8733504.

The previous prime is 33172873. The next prime is 33172891. The reversal of 33172890 is 9827133.

It is a super-2 number, since 2×33172890² = 2200881261904200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33172891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4629 + ... + 9368.

It is an arithmetic number, because the mean of its divisors is an integer number (2519640).

Almost surely, 2^33172890 is an apocalyptic number.

33172890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

33172890 is an abundant number, since it is smaller than the sum of its proper divisors (47455590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33172890 is a wasteful number, since it uses less digits than its factorization.

33172890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14086.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 33172890 is about 5759.5911313217. The cubic root of 33172890 is about 321.3126097392.

The spelling of 33172890 in words is "thirty-three million, one hundred seventy-two thousand, eight hundred ninety".