400720054 has 16 divisors (see below), whose sum is σ = 689627808. Its totient is φ = 171067392.

The previous prime is 400720031. The next prime is 400720069. The reversal of 400720054 is 450027004.

It is a congruent number.

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, 52089 + ... + 59284.

It is an arithmetic number, because the mean of its divisors is an integer number (43101738).

Almost surely, 2^400720054 is an apocalyptic number.

400720054 is a deficient number, since it is larger than the sum of its proper divisors (288907754).

400720054 is a wasteful number, since it uses less digits than its factorization.

400720054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111639.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 400720054 is about 20017.9932560684. The cubic root of 400720054 is about 737.2481516391.

Adding to 400720054 its reverse (450027004), we get a palindrome (850747058).

The spelling of 400720054 in words is "four hundred million, seven hundred twenty thousand, fifty-four".