406549680 has 40 divisors (see below), whose sum is σ = 1260304752. Its totient is φ = 108413184.

The previous prime is 406549667. The next prime is 406549699. The reversal of 406549680 is 86945604.

It is a tau number, because it is divible by the number of its divisors (40).

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, 846739 + ... + 847218.

Almost surely, 2^406549680 is an apocalyptic number.

406549680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

406549680 is an abundant number, since it is smaller than the sum of its proper divisors (853755072).

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

406549680 is a wasteful number, since it uses less digits than its factorization.

406549680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693973 (or 1693967 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 406549680 is about 20163.0771461104. The cubic root of 406549680 is about 740.8060853293.

The spelling of 406549680 in words is "four hundred six million, five hundred forty-nine thousand, six hundred eighty".