400187140 has 96 divisors (see below), whose sum is σ = 923166720. Its totient is φ = 145127424.

The previous prime is 400187129. The next prime is 400187159. The reversal of 400187140 is 41781004.

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, 1262262 + ... + 1262578.

It is an arithmetic number, because the mean of its divisors is an integer number (9616320).

Almost surely, 2^400187140 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 400187140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461583360).

400187140 is an abundant number, since it is smaller than the sum of its proper divisors (522979580).

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

400187140 is a wasteful number, since it uses less digits than its factorization.

400187140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 400187140 is about 20004.6779529189. The cubic root of 400187140 is about 736.9211867558.

The spelling of 400187140 in words is "four hundred million, one hundred eighty-seven thousand, one hundred forty".