40389715 has 8 divisors (see below), whose sum is σ = 49650048. Its totient is φ = 31523520.

The previous prime is 40389707. The next prime is 40389731. The reversal of 40389715 is 51798304.

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

It is not a de Polignac number, because 40389715 - 2³ = 40389707 is a prime.

It is a Duffinian 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, 98307 + ... + 98716.

It is an arithmetic number, because the mean of its divisors is an integer number (6206256).

Almost surely, 2^40389715 is an apocalyptic number.

40389715 is a deficient number, since it is larger than the sum of its proper divisors (9260333).

40389715 is a wasteful number, since it uses less digits than its factorization.

40389715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197069.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 40389715 is about 6355.2903159494. The cubic root of 40389715 is about 343.1022738135.

The spelling of 40389715 in words is "forty million, three hundred eighty-nine thousand, seven hundred fifteen".