40290388 has 24 divisors (see below), whose sum is σ = 74971008. Its totient is φ = 18903456.

The previous prime is 40290377. The next prime is 40290409. The reversal of 40290388 is 88309204.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 745 + ... + 9007.

It is an arithmetic number, because the mean of its divisors is an integer number (3123792).

Almost surely, 2^40290388 is an apocalyptic number.

It is an amenable number.

40290388 is a deficient number, since it is larger than the sum of its proper divisors (34680620).

40290388 is a wasteful number, since it uses less digits than its factorization.

40290388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8343 (or 8341 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 40290388 is about 6347.4709924505. The cubic root of 40290388 is about 342.8207888372.

The spelling of 40290388 in words is "forty million, two hundred ninety thousand, three hundred eighty-eight".