404006740 has 12 divisors (see below), whose sum is σ = 848414196. Its totient is φ = 161602688.

The previous prime is 404006731. The next prime is 404006773. The reversal of 404006740 is 47600404.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 267257104 + 136749636 = 16348^2 + 11694^2 .

It is a congruent number.

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, 10100149 + ... + 10100188.

It is an arithmetic number, because the mean of its divisors is an integer number (70701183).

Almost surely, 2^404006740 is an apocalyptic number.

It is an amenable number.

404006740 is an abundant number, since it is smaller than the sum of its proper divisors (444407456).

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

404006740 is a wasteful number, since it uses less digits than its factorization.

404006740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20200346 (or 20200344 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 404006740 is about 20099.9189053090. The cubic root of 404006740 is about 739.2582901825.

The spelling of 404006740 in words is "four hundred four million, six thousand, seven hundred forty".