40013387 has 8 divisors (see below), whose sum is σ = 41186880. Its totient is φ = 38856520.

The previous prime is 40013371. The next prime is 40013419. The reversal of 40013387 is 78331004.

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

It is a cyclic number.

It is not a de Polignac number, because 40013387 - 2⁴ = 40013371 is a prime.

It is a super-2 number, since 2×40013387² = 3202142278423538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40013327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812 + ... + 8982.

It is an arithmetic number, because the mean of its divisors is an integer number (5148360).

Almost surely, 2^40013387 is an apocalyptic number.

40013387 is a deficient number, since it is larger than the sum of its proper divisors (1173493).

40013387 is an equidigital number, since it uses as much as digits as its factorization.

40013387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8313.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 40013387 is about 6325.6135670779. The cubic root of 40013387 is about 342.0333374932.

The spelling of 40013387 in words is "forty million, thirteen thousand, three hundred eighty-seven".