401040432 has 120 divisors (see below), whose sum is σ = 1214564624. Its totient is φ = 122798592.

The previous prime is 401040427. The next prime is 401040457. The reversal of 401040432 is 234040104.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 529398 + ... + 530154.

Almost surely, 2^401040432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401040432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (607282312).

401040432 is an abundant number, since it is smaller than the sum of its proper divisors (813524192).

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

401040432 is a wasteful number, since it uses less digits than its factorization.

401040432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067 (or 1058 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 401040432 is about 20025.9939079188. The cubic root of 401040432 is about 737.4445773538. Note that the first 3 decimals are identical.

Adding to 401040432 its reverse (234040104), we get a palindrome (635080536).

The spelling of 401040432 in words is "four hundred one million, forty thousand, four hundred thirty-two".