404020680 has 96 divisors (see below), whose sum is σ = 1409970240. Its totient is φ = 92346240.

The previous prime is 404020651. The next prime is 404020699. The reversal of 404020680 is 86020404.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 404020680.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28476 + ... + 40235.

It is an arithmetic number, because the mean of its divisors is an integer number (14687190).

Almost surely, 2^404020680 is an apocalyptic number.

404020680 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404020680 is an abundant number, since it is smaller than the sum of its proper divisors (1005949560).

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

404020680 is a wasteful number, since it uses less digits than its factorization.

404020680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68739 (or 68728 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 404020680 is about 20100.2656698861. The cubic root of 404020680 is about 739.2667926331.

The spelling of 404020680 in words is "four hundred four million, twenty thousand, six hundred eighty".