400770140 has 36 divisors (see below), whose sum is σ = 871675896. Its totient is φ = 154773696.

The previous prime is 400770127. The next prime is 400770197. The reversal of 400770140 is 41077004.

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, 4907 + ... + 28733.

Almost surely, 2^400770140 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 400770140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (435837948).

400770140 is an abundant number, since it is smaller than the sum of its proper divisors (470905756).

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

400770140 is a wasteful number, since it uses less digits than its factorization.

400770140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23894 (or 23863 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 23.

The square root of 400770140 is about 20019.2442414792. The cubic root of 400770140 is about 737.2788665752.

It can be divided in two parts, 4007 and 70140, that added together give a palindrome (74147).

The spelling of 400770140 in words is "four hundred million, seven hundred seventy thousand, one hundred forty".