400940458 has 4 divisors (see below), whose sum is σ = 601410690. Its totient is φ = 200470228.

The previous prime is 400940437. The next prime is 400940467. The reversal of 400940458 is 854049004.

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., 382476249 + 18464209 = 19557^2 + 4297^2 .

It is a super-2 number, since 2×400940458² = 321506501722499528, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100235113 + ... + 100235116.

Almost surely, 2^400940458 is an apocalyptic number.

400940458 is a deficient number, since it is larger than the sum of its proper divisors (200470232).

400940458 is a wasteful number, since it uses less digits than its factorization.

400940458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200470231.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 400940458 is about 20023.4976465152. The cubic root of 400940458 is about 737.3832939143.

The spelling of 400940458 in words is "four hundred million, nine hundred forty thousand, four hundred fifty-eight".