400512450 has 48 divisors (see below), whose sum is σ = 1069681536. Its totient is φ = 98587200.

The previous prime is 400512403. The next prime is 400512461. The reversal of 400512450 is 54215004.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100746 + ... + 104645.

It is an arithmetic number, because the mean of its divisors is an integer number (22285032).

Almost surely, 2^400512450 is an apocalyptic number.

400512450 is an abundant number, since it is smaller than the sum of its proper divisors (669169086).

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

400512450 is a wasteful number, since it uses less digits than its factorization.

400512450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205419 (or 205414 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 400512450 is about 20012.8071494231. The cubic root of 400512450 is about 737.1208124465.

Adding to 400512450 its reverse (54215004), we get a palindrome (454727454).

The spelling of 400512450 in words is "four hundred million, five hundred twelve thousand, four hundred fifty".