400502634 has 64 divisors (see below), whose sum is σ = 1005557760. Its totient is φ = 103688640.

The previous prime is 400502603. The next prime is 400502647. The reversal of 400502634 is 436205004.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7444 + ... + 29264.

It is an arithmetic number, because the mean of its divisors is an integer number (15711840).

Almost surely, 2^400502634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400502634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (502778880).

400502634 is an abundant number, since it is smaller than the sum of its proper divisors (605055126).

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

400502634 is a wasteful number, since it uses less digits than its factorization.

400502634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21875.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 400502634 is about 20012.5619049636. The cubic root of 400502634 is about 737.1147904639.

Adding to 400502634 its reverse (436205004), we get a palindrome (836707638).

The spelling of 400502634 in words is "four hundred million, five hundred two thousand, six hundred thirty-four".