40188828 has 12 divisors (see below), whose sum is σ = 93773960. Its totient is φ = 13396272.

The previous prime is 40188823. The next prime is 40188829. The reversal of 40188828 is 82888104.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40188821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1674523 + ... + 1674546.

Almost surely, 2^40188828 is an apocalyptic number.

It is an amenable number.

40188828 is an abundant number, since it is smaller than the sum of its proper divisors (53585132).

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

40188828 is a wasteful number, since it uses less digits than its factorization.

40188828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3349076 (or 3349074 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 40188828 is about 6339.4659081030. The cubic root of 40188828 is about 342.5324969609.

The spelling of 40188828 in words is "forty million, one hundred eighty-eight thousand, eight hundred twenty-eight".