406876393391 has 16 divisors (see below), whose sum is σ = 442944954144. Its totient is φ = 371511364224.

The previous prime is 406876393367. The next prime is 406876393409. The reversal of 406876393391 is 193393678604.

It is a happy number.

It is not a de Polignac number, because 406876393391 - 2²² = 406872199087 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406876393391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406876303391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16121 + ... + 902226.

It is an arithmetic number, because the mean of its divisors is an integer number (27684059634).

Almost surely, 2^406876393391 is an apocalyptic number.

406876393391 is a deficient number, since it is larger than the sum of its proper divisors (36068560753).

406876393391 is a wasteful number, since it uses less digits than its factorization.

406876393391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918730.

The product of its (nonzero) digits is 17635968, while the sum is 59.

The spelling of 406876393391 in words is "four hundred six billion, eight hundred seventy-six million, three hundred ninety-three thousand, three hundred ninety-one".