400001432 has 48 divisors (see below), whose sum is σ = 822563520. Its totient is φ = 182131200.

The previous prime is 400001429. The next prime is 400001447. The reversal of 400001432 is 234100004.

It is a super-2 number, since 2×400001432² = 320002291204101248, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68882 + ... + 74462.

It is an arithmetic number, because the mean of its divisors is an integer number (17136740).

Almost surely, 2^400001432 is an apocalyptic number.

It is an amenable number.

400001432 is an abundant number, since it is smaller than the sum of its proper divisors (422562088).

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

400001432 is a wasteful number, since it uses less digits than its factorization.

400001432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5652 (or 5631 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 400001432 is about 20000.0357999680. The cubic root of 400001432 is about 736.8071789825.

Adding to 400001432 its reverse (234100004), we get a palindrome (634101436).

The spelling of 400001432 in words is "four hundred million, one thousand, four hundred thirty-two".