402472391905 has 8 divisors (see below), whose sum is σ = 483225567552. Its totient is φ = 321805448688.

The previous prime is 402472391899. The next prime is 402472391921. The reversal of 402472391905 is 509193274204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402472391905 - 2³ = 402472391897 is a prime.

It is a Duffinian 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, 21547837 + ... + 21566506.

It is an arithmetic number, because the mean of its divisors is an integer number (60403195944).

Almost surely, 2^402472391905 is an apocalyptic number.

It is an amenable number.

402472391905 is a deficient number, since it is larger than the sum of its proper divisors (80753175647).

402472391905 is a wasteful number, since it uses less digits than its factorization.

402472391905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43116215.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 402472391905 in words is "four hundred two billion, four hundred seventy-two million, three hundred ninety-one thousand, nine hundred five".