406397718 has 24 divisors (see below), whose sum is σ = 918813168. Its totient is φ = 129575952.

The previous prime is 406397713. The next prime is 406397729. The reversal of 406397718 is 817793604.

406397718 is a `hidden beast` number, since 4 + 0 + 639 + 7 + 7 + 1 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406397713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 490405 + ... + 491232.

It is an arithmetic number, because the mean of its divisors is an integer number (38283882).

Almost surely, 2^406397718 is an apocalyptic number.

406397718 is an abundant number, since it is smaller than the sum of its proper divisors (512415450).

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

406397718 is a wasteful number, since it uses less digits than its factorization.

406397718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981668 (or 981665 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 406397718 is about 20159.3084702824. The cubic root of 406397718 is about 740.7137731971.

The spelling of 406397718 in words is "four hundred six million, three hundred ninety-seven thousand, seven hundred eighteen".