406342390784 has 44 divisors (see below), whose sum is σ = 886132347648. Its totient is φ = 184701081600.

The previous prime is 406342390771. The next prime is 406342390807. The reversal of 406342390784 is 487093243604.

It is a tau number, because it is divible by the number of its divisors (44).

It is a super-2 number, since 2×406342390784² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18025952 + ... + 18048479.

Almost surely, 2^406342390784 is an apocalyptic number.

406342390784 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

406342390784 is an abundant number, since it is smaller than the sum of its proper divisors (479789956864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

406342390784 is a wasteful number, since it uses less digits than its factorization.

406342390784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36074462 (or 36074444 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 50.

The spelling of 406342390784 in words is "four hundred six billion, three hundred forty-two million, three hundred ninety thousand, seven hundred eighty-four".