33400890 has 32 divisors (see below), whose sum is σ = 89069760. Its totient is φ = 8906832.

The previous prime is 33400889. The next prime is 33400897. The reversal of 33400890 is 9800433.

It is a super-2 number, since 2×33400890² = 2231238905584200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (33400897) 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, 61584 + ... + 62123.

It is an arithmetic number, because the mean of its divisors is an integer number (2783430).

Almost surely, 2^33400890 is an apocalyptic number.

33400890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

33400890 is an abundant number, since it is smaller than the sum of its proper divisors (55668870).

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

33400890 is a wasteful number, since it uses less digits than its factorization.

33400890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123723 (or 123717 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 33400890 is about 5779.3503095071. The cubic root of 33400890 is about 322.0470656354.

The spelling of 33400890 in words is "thirty-three million, four hundred thousand, eight hundred ninety".