400402617340 has 72 divisors (see below), whose sum is σ = 926323922160. Its totient is φ = 145271892480.

The previous prime is 400402617337. The next prime is 400402617359. The reversal of 400402617340 is 43716204004.

It is a congruent number.

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, 885316 + ... + 1258804.

It is an arithmetic number, because the mean of its divisors is an integer number (12865610030).

Almost surely, 2^400402617340 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 400402617340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (463161961080).

400402617340 is an abundant number, since it is smaller than the sum of its proper divisors (525921304820).

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

400402617340 is a wasteful number, since it uses less digits than its factorization.

400402617340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373963 (or 373950 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 31.

The spelling of 400402617340 in words is "four hundred billion, four hundred two million, six hundred seventeen thousand, three hundred forty".