400472878905 has 24 divisors (see below), whose sum is σ = 757257808320. Its totient is φ = 194168668320.

The previous prime is 400472878901. The next prime is 400472878961. The reversal of 400472878905 is 509878274004.

It is a happy number.

400472878905 is a `hidden beast` number, since 4 + 0 + 0 + 472 + 87 + 8 + 90 + 5 = 666.

It is not a de Polignac number, because 400472878905 - 2² = 400472878901 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (400472878901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404517565 + ... + 404518554.

It is an arithmetic number, because the mean of its divisors is an integer number (31552408680).

Almost surely, 2^400472878905 is an apocalyptic number.

400472878905 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

400472878905 is a deficient number, since it is larger than the sum of its proper divisors (356784929415).

400472878905 is a wasteful number, since it uses less digits than its factorization.

400472878905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809036141 (or 809036138 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 400472878905 in words is "four hundred billion, four hundred seventy-two million, eight hundred seventy-eight thousand, nine hundred five".