404749780 has 24 divisors (see below), whose sum is σ = 894710880. Its totient is φ = 153378720.

The previous prime is 404749777. The next prime is 404749789. The reversal of 404749780 is 87947404.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404749789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532186 + ... + 532945.

It is an arithmetic number, because the mean of its divisors is an integer number (37279620).

Almost surely, 2^404749780 is an apocalyptic number.

It is an amenable number.

404749780 is an abundant number, since it is smaller than the sum of its proper divisors (489961100).

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

404749780 is a wasteful number, since it uses less digits than its factorization.

404749780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065159 (or 1065157 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 404749780 is about 20118.3940710982. The cubic root of 404749780 is about 739.7112216288.

The spelling of 404749780 in words is "four hundred four million, seven hundred forty-nine thousand, seven hundred eighty".