403671680 has 32 divisors (see below), whose sum is σ = 965029140. Its totient is φ = 161468416.

The previous prime is 403671679. The next prime is 403671703. The reversal of 403671680 is 86176304.

It can be written as a sum of positive squares in 2 ways, for example, as 399040576 + 4631104 = 19976^2 + 2152^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 403671680.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314729 + ... + 316008.

Almost surely, 2^403671680 is an apocalyptic number.

403671680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

403671680 is an abundant number, since it is smaller than the sum of its proper divisors (561357460).

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

403671680 is an equidigital number, since it uses as much as digits as its factorization.

403671680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630756 (or 630744 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 403671680 is about 20091.5823169804. The cubic root of 403671680 is about 739.0538675292.

The spelling of 403671680 in words is "four hundred three million, six hundred seventy-one thousand, six hundred eighty".