406688682840 has 64 divisors (see below), whose sum is σ = 1330981148160. Its totient is φ = 98591195520.

The previous prime is 406688682833. The next prime is 406688682863. The reversal of 406688682840 is 48286886604.

It is a super-2 number, since 2×406688682840² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154047424 + ... + 154050063.

It is an arithmetic number, because the mean of its divisors is an integer number (20796580440).

Almost surely, 2^406688682840 is an apocalyptic number.

406688682840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

406688682840 is an abundant number, since it is smaller than the sum of its proper divisors (924292465320).

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

406688682840 is a wasteful number, since it uses less digits than its factorization.

406688682840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308097512 (or 308097508 counting only the distinct ones).

The product of its (nonzero) digits is 28311552, while the sum is 60.

The spelling of 406688682840 in words is "four hundred six billion, six hundred eighty-eight million, six hundred eighty-two thousand, eight hundred forty".