40290238 has 16 divisors (see below), whose sum is σ = 64353744. Its totient is φ = 18852480.

The previous prime is 40290223. The next prime is 40290247. The reversal of 40290238 is 83209204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2881 + ... + 9427.

It is an arithmetic number, because the mean of its divisors is an integer number (4022109).

Almost surely, 2^40290238 is an apocalyptic number.

40290238 is a deficient number, since it is larger than the sum of its proper divisors (24063506).

40290238 is a wasteful number, since it uses less digits than its factorization.

40290238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6747.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 40290238 is about 6347.4591767100. The cubic root of 40290238 is about 342.8203633993.

The spelling of 40290238 in words is "forty million, two hundred ninety thousand, two hundred thirty-eight".