404232140 has 24 divisors (see below), whose sum is σ = 914187120. Its totient is φ = 149254848.

The previous prime is 404232133. The next prime is 404232173. The reversal of 404232140 is 41232404.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 777110 + ... + 777629.

It is an arithmetic number, because the mean of its divisors is an integer number (38091130).

Almost surely, 2^404232140 is an apocalyptic number.

It is an amenable number.

404232140 is an abundant number, since it is smaller than the sum of its proper divisors (509954980).

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

404232140 is a wasteful number, since it uses less digits than its factorization.

404232140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554761 (or 1554759 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 404232140 is about 20105.5251112723. The cubic root of 404232140 is about 739.3957448531.

Adding to 404232140 its reverse (41232404), we get a palindrome (445464544).

The spelling of 404232140 in words is "four hundred four million, two hundred thirty-two thousand, one hundred forty".