404623980 has 144 divisors (see below), whose sum is σ = 1277980704. Its totient is φ = 103541760.

The previous prime is 404623949. The next prime is 404624009. The reversal of 404623980 is 89326404.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 471712 + ... + 472568.

It is an arithmetic number, because the mean of its divisors is an integer number (8874866).

Almost surely, 2^404623980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404623980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (638990352).

404623980 is an abundant number, since it is smaller than the sum of its proper divisors (873356724).

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

404623980 is a wasteful number, since it uses less digits than its factorization.

404623980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976 (or 971 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 404623980 is about 20115.2673360311. The cubic root of 404623980 is about 739.6345773094.

The spelling of 404623980 in words is "four hundred four million, six hundred twenty-three thousand, nine hundred eighty".