40404458 has 4 divisors (see below), whose sum is σ = 60606690. Its totient is φ = 20202228.

The previous prime is 40404457. The next prime is 40404493. The reversal of 40404458 is 85440404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 36881329 + 3523129 = 6073^2 + 1877^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40404458.

It is not an unprimeable number, because it can be changed into a prime (40404457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101113 + ... + 10101116.

Almost surely, 2^40404458 is an apocalyptic number.

40404458 is a deficient number, since it is larger than the sum of its proper divisors (20202232).

40404458 is a wasteful number, since it uses less digits than its factorization.

40404458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20202231.

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 40404458 is about 6356.4501099277. The cubic root of 40404458 is about 343.1440149802.

The spelling of 40404458 in words is "forty million, four hundred four thousand, four hundred fifty-eight".