40420408 has 16 divisors (see below), whose sum is σ = 86615280. Its totient is φ = 17323008.

The previous prime is 40420381. The next prime is 40420411. The reversal of 40420408 is 80402404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360841 + ... + 360952.

It is an arithmetic number, because the mean of its divisors is an integer number (5413455).

Almost surely, 2^40420408 is an apocalyptic number.

It is an amenable number.

40420408 is an abundant number, since it is smaller than the sum of its proper divisors (46194872).

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

40420408 is a wasteful number, since it uses less digits than its factorization.

40420408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721806 (or 721802 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 40420408 is about 6357.7046172341. The cubic root of 40420408 is about 343.1891620364.

The spelling of 40420408 in words is "forty million, four hundred twenty thousand, four hundred eight".