40312990 has 16 divisors (see below), whose sum is σ = 72777600. Its totient is φ = 16077600.

The previous prime is 40312969. The next prime is 40313011. The reversal of 40312990 is 9921304.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40312969) and next prime (40313011).

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, 2286 + ... + 9265.

It is an arithmetic number, because the mean of its divisors is an integer number (4548600).

Almost surely, 2^40312990 is an apocalyptic number.

40312990 is a deficient number, since it is larger than the sum of its proper divisors (32464610).

40312990 is a wasteful number, since it uses less digits than its factorization.

40312990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11907.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 40312990 is about 6349.2511369452. The cubic root of 40312990 is about 342.8848817670.

It can be divided in two parts, 4031 and 2990, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 40312990 in words is "forty million, three hundred twelve thousand, nine hundred ninety".