33640080 has 40 divisors (see below), whose sum is σ = 104284992. Its totient is φ = 8970624.

The previous prime is 33640073. The next prime is 33640081. The reversal of 33640080 is 8004633.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×33640080² = 2263309964812800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 33640080.

It is not an unprimeable number, because it can be changed into a prime (33640081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69844 + ... + 70323.

Almost surely, 2^33640080 is an apocalyptic number.

33640080 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33640080 is an abundant number, since it is smaller than the sum of its proper divisors (70644912).

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

33640080 is a wasteful number, since it uses less digits than its factorization.

33640080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140183 (or 140177 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 33640080 is about 5800.0068965476. The cubic root of 33640080 is about 322.8139842141.

The spelling of 33640080 in words is "thirty-three million, six hundred forty thousand, eighty".