40120464 has 40 divisors (see below), whose sum is σ = 108153792. Its totient is φ = 12791680.

The previous prime is 40120463. The next prime is 40120477. The reversal of 40120464 is 46402104.

It is a self number, because there is not a number n which added to its sum of digits gives 40120464.

It is not an unprimeable number, because it can be changed into a prime (40120463) 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, 17067 + ... + 19274.

Almost surely, 2^40120464 is an apocalyptic number.

It is an amenable number.

40120464 is an abundant number, since it is smaller than the sum of its proper divisors (68033328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40120464 is a wasteful number, since it uses less digits than its factorization.

40120464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36375 (or 36369 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 40120464 is about 6334.0716762601. The cubic root of 40120464 is about 342.3381628365.

Adding to 40120464 its reverse (46402104), we get a palindrome (86522568).

The spelling of 40120464 in words is "forty million, one hundred twenty thousand, four hundred sixty-four".