404601780 has 96 divisors (see below), whose sum is σ = 1241735040. Its totient is φ = 97620480.

The previous prime is 404601779. The next prime is 404601793. The reversal of 404601780 is 87106404.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149802 + ... + 152478.

It is an arithmetic number, because the mean of its divisors is an integer number (12934740).

Almost surely, 2^404601780 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 404601780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620867520).

404601780 is an abundant number, since it is smaller than the sum of its proper divisors (837133260).

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

404601780 is a wasteful number, since it uses less digits than its factorization.

404601780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2929 (or 2927 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 404601780 is about 20114.7155088010. The cubic root of 404601780 is about 739.6210501923.

The spelling of 404601780 in words is "four hundred four million, six hundred one thousand, seven hundred eighty".