40390836 has 24 divisors (see below), whose sum is σ = 94390464. Its totient is φ = 13442880.

The previous prime is 40390807. The next prime is 40390841. The reversal of 40390836 is 63809304.

It is a junction number, because it is equal to n+sod(n) for n = 40390797 and 40390806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6921 + ... + 11343.

It is an arithmetic number, because the mean of its divisors is an integer number (3932936).

Almost surely, 2^40390836 is an apocalyptic number.

It is an amenable number.

40390836 is an abundant number, since it is smaller than the sum of its proper divisors (53999628).

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

40390836 is a wasteful number, since it uses less digits than its factorization.

40390836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5191 (or 5189 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 40390836 is about 6355.3785095775. The cubic root of 40390836 is about 343.1054480052.

The spelling of 40390836 in words is "forty million, three hundred ninety thousand, eight hundred thirty-six".