400454256 has 80 divisors (see below), whose sum is σ = 1066947584. Its totient is φ = 129330432.

The previous prime is 400454237. The next prime is 400454269. The reversal of 400454256 is 652454004.

It is a super-2 number, since 2×400454256² = 320727222297027072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 822045 + ... + 822531.

Almost surely, 2^400454256 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 400454256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (533473792).

400454256 is an abundant number, since it is smaller than the sum of its proper divisors (666493328).

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

400454256 is a wasteful number, since it uses less digits than its factorization.

400454256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998 (or 992 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 400454256 is about 20011.3531776339. The cubic root of 400454256 is about 737.0851097808.

The spelling of 400454256 in words is "four hundred million, four hundred fifty-four thousand, two hundred fifty-six".