400869882 has 36 divisors (see below), whose sum is σ = 1010357946. Its totient is φ = 114534000.

The previous prime is 400869881. The next prime is 400869901. The reversal of 400869882 is 288968004.

It is a happy number.

400869882 is a `hidden beast` number, since 400 + 86 + 98 + 82 = 666.

It can be written as a sum of positive squares in only one way, i.e., 209351961 + 191517921 = 14469^2 + 13839^2 .

It is not an unprimeable number, because it can be changed into a prime (400869881) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 226369 + ... + 228132.

Almost surely, 2^400869882 is an apocalyptic number.

400869882 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

400869882 is an abundant number, since it is smaller than the sum of its proper divisors (609488064).

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

400869882 is a wasteful number, since it uses less digits than its factorization.

400869882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454523 (or 454513 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 400869882 is about 20021.7352394841. The cubic root of 400869882 is about 737.3400251311.

The spelling of 400869882 in words is "four hundred million, eight hundred sixty-nine thousand, eight hundred eighty-two".