40388967 has 12 divisors (see below), whose sum is σ = 60351720. Its totient is φ = 25997328.

The previous prime is 40388963. The next prime is 40388993. The reversal of 40388967 is 76988304.

It is a happy number.

It is not a de Polignac number, because 40388967 - 2² = 40388963 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40388963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77113 + ... + 77634.

It is an arithmetic number, because the mean of its divisors is an integer number (5029310).

Almost surely, 2^40388967 is an apocalyptic number.

40388967 is a deficient number, since it is larger than the sum of its proper divisors (19962753).

40388967 is a wasteful number, since it uses less digits than its factorization.

40388967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154782 (or 154779 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 40388967 is about 6355.2314670671. The cubic root of 40388967 is about 343.1001557654.

The spelling of 40388967 in words is "forty million, three hundred eighty-eight thousand, nine hundred sixty-seven".