42406404 has 24 divisors (see below), whose sum is σ = 104156640. Its totient is φ = 13391424.

The previous prime is 42406391. The next prime is 42406433. The reversal of 42406404 is 40460424.

It is a super-2 number, since 2×42406404² = 3596606200422432, which contains 22 as substring.

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, 92769 + ... + 93224.

It is an arithmetic number, because the mean of its divisors is an integer number (4339860).

Almost surely, 2^42406404 is an apocalyptic number.

It is an amenable number.

42406404 is an abundant number, since it is smaller than the sum of its proper divisors (61750236).

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

42406404 is a wasteful number, since it uses less digits than its factorization.

42406404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186019 (or 186017 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 42406404 is about 6512.0199631144. The cubic root of 42406404 is about 348.7202351237.

Adding to 42406404 its reverse (40460424), we get a palindrome (82866828).

The spelling of 42406404 in words is "forty-two million, four hundred six thousand, four hundred four".