400115452 has 48 divisors (see below), whose sum is σ = 839059200. Its totient is φ = 164799360.

The previous prime is 400115449. The next prime is 400115461. The reversal of 400115452 is 254511004.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8824 + ... + 29632.

It is an arithmetic number, because the mean of its divisors is an integer number (17480400).

Almost surely, 2^400115452 is an apocalyptic number.

It is an amenable number.

400115452 is an abundant number, since it is smaller than the sum of its proper divisors (438943748).

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

400115452 is a wasteful number, since it uses less digits than its factorization.

400115452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20866 (or 20864 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 400115452 is about 20002.8860917619. The cubic root of 400115452 is about 736.8771810431.

Adding to 400115452 its reverse (254511004), we get a palindrome (654626456).

The spelling of 400115452 in words is "four hundred million, one hundred fifteen thousand, four hundred fifty-two".