40420631 has 8 divisors (see below), whose sum is σ = 41150064. Its totient is φ = 39695040.

The previous prime is 40420573. The next prime is 40420643. The reversal of 40420631 is 13602404.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40420631 - 2²² = 36226327 is a prime.

It is a super-2 number, since 2×40420631² = 3267654820876322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40420651) 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, 27491 + ... + 28923.

It is an arithmetic number, because the mean of its divisors is an integer number (5143758).

Almost surely, 2^40420631 is an apocalyptic number.

40420631 is a deficient number, since it is larger than the sum of its proper divisors (729433).

40420631 is a wasteful number, since it uses less digits than its factorization.

40420631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 40420631 is about 6357.7221549860. The cubic root of 40420631 is about 343.1897931619.

The spelling of 40420631 in words is "forty million, four hundred twenty thousand, six hundred thirty-one".