40390407 has 10 divisors (see below), whose sum is σ = 60336408. Its totient is φ = 26926884.

The previous prime is 40390393. The next prime is 40390411. The reversal of 40390407 is 70409304.

It is not a de Polignac number, because 40390407 - 2⁴ = 40390391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40390807) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 249243 + ... + 249404.

Almost surely, 2^40390407 is an apocalyptic number.

40390407 is a deficient number, since it is larger than the sum of its proper divisors (19946001).

40390407 is an equidigital number, since it uses as much as digits as its factorization.

40390407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498659 (or 498650 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 40390407 is about 6355.3447585477. The cubic root of 40390407 is about 343.1042332679.

40390407 divided by its sum of digits (27) gives a palindrome (1495941).

The spelling of 40390407 in words is "forty million, three hundred ninety thousand, four hundred seven".