400889892 has 96 divisors (see below), whose sum is σ = 1094840320. Its totient is φ = 113063040.

The previous prime is 400889843. The next prime is 400889897. The reversal of 400889892 is 298988004.

It is not an unprimeable number, because it can be changed into a prime (400889897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89703 + ... + 94065.

Almost surely, 2^400889892 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 400889892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547420160).

400889892 is an abundant number, since it is smaller than the sum of its proper divisors (693950428).

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

400889892 is a wasteful number, since it uses less digits than its factorization.

400889892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4433 (or 4431 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 400889892 is about 20022.2349401859. The cubic root of 400889892 is about 737.3522933916.

The spelling of 400889892 in words is "four hundred million, eight hundred eighty-nine thousand, eight hundred ninety-two".