40386994 has 8 divisors (see below), whose sum is σ = 60966828. Its totient is φ = 20064720.

The previous prime is 40386979. The next prime is 40387003. The reversal of 40386994 is 49968304.

It can be written as a sum of positive squares in 2 ways, for example, as 35820225 + 4566769 = 5985^2 + 2137^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40386994² = 3262218568712072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40386994.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63997 + ... + 64624.

Almost surely, 2^40386994 is an apocalyptic number.

40386994 is a deficient number, since it is larger than the sum of its proper divisors (20579834).

40386994 is a wasteful number, since it uses less digits than its factorization.

40386994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128780.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 40386994 is about 6355.0762387244. The cubic root of 40386994 is about 343.0945688631.

The spelling of 40386994 in words is "forty million, three hundred eighty-six thousand, nine hundred ninety-four".