406405768 has 32 divisors (see below), whose sum is σ = 822571200. Its totient is φ = 187663168.

The previous prime is 406405759. The next prime is 406405787. The reversal of 406405768 is 867504604.

It is a self number, because there is not a number n which added to its sum of digits gives 406405768.

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, 32746 + ... + 43417.

It is an arithmetic number, because the mean of its divisors is an integer number (25705350).

Almost surely, 2^406405768 is an apocalyptic number.

It is an amenable number.

406405768 is an abundant number, since it is smaller than the sum of its proper divisors (416165432).

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

406405768 is a wasteful number, since it uses less digits than its factorization.

406405768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76221 (or 76217 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 406405768 is about 20159.5081289202. The cubic root of 406405768 is about 740.7186638959.

The spelling of 406405768 in words is "four hundred six million, four hundred five thousand, seven hundred sixty-eight".