400897792 has 36 divisors (see below), whose sum is σ = 802993576. Its totient is φ = 199756800.

The previous prime is 400897759. The next prime is 400897793. The reversal of 400897792 is 297798004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400897793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76042 + ... + 81142.

Almost surely, 2^400897792 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 400897792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401496788).

400897792 is an abundant number, since it is smaller than the sum of its proper divisors (402095784).

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

400897792 is an equidigital number, since it uses as much as digits as its factorization.

400897792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5424 (or 5410 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 400897792 is about 20022.4322198878. The cubic root of 400897792 is about 737.3571368203.

The spelling of 400897792 in words is "four hundred million, eight hundred ninety-seven thousand, seven hundred ninety-two".