400113040 has 20 divisors (see below), whose sum is σ = 930263004. Its totient is φ = 160045184.

The previous prime is 400113019. The next prime is 400113047. The reversal of 400113040 is 40311004.

It can be written as a sum of positive squares in 2 ways, for example, as 101929216 + 298183824 = 10096^2 + 17268^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 400113040.

It is not an unprimeable number, because it can be changed into a prime (400113047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2500627 + ... + 2500786.

Almost surely, 2^400113040 is an apocalyptic number.

400113040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400113040 is an abundant number, since it is smaller than the sum of its proper divisors (530149964).

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

400113040 is a wasteful number, since it uses less digits than its factorization.

400113040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5001426 (or 5001420 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 400113040 is about 20002.8258003713. The cubic root of 400113040 is about 736.8757003444.

Adding to 400113040 its reverse (40311004), we get a palindrome (440424044).

The spelling of 400113040 in words is "four hundred million, one hundred thirteen thousand, forty".