400630632 has 64 divisors (see below), whose sum is σ = 1029300480. Its totient is φ = 129883392.

The previous prime is 400630631. The next prime is 400630663. The reversal of 400630632 is 236036004.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (400630631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194118 + ... + 196170.

It is an arithmetic number, because the mean of its divisors is an integer number (16082820).

Almost surely, 2^400630632 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 400630632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (514650240).

400630632 is an abundant number, since it is smaller than the sum of its proper divisors (628669848).

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

400630632 is a wasteful number, since it uses less digits than its factorization.

400630632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2282 (or 2278 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 400630632 is about 20015.7595908824. The cubic root of 400630632 is about 737.1933077749.

Adding to 400630632 its reverse (236036004), we get a palindrome (636666636).

The spelling of 400630632 in words is "four hundred million, six hundred thirty thousand, six hundred thirty-two".