400881340860 has 1152 divisors, whose sum is σ = 1624935997440. Its totient is φ = 71489433600.

The previous prime is 400881340843. The next prime is 400881340939. The reversal of 400881340860 is 68043188004.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 904923799 + ... + 904924241.

It is an arithmetic number, because the mean of its divisors is an integer number (1410534720).

Almost surely, 2^400881340860 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 400881340860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812467998720).

400881340860 is an abundant number, since it is smaller than the sum of its proper divisors (1224054656580).

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

400881340860 is a wasteful number, since it uses less digits than its factorization.

400881340860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 564 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 400881340860 in words is "four hundred billion, eight hundred eighty-one million, three hundred forty thousand, eight hundred sixty".