400121248 has 96 divisors (see below), whose sum is σ = 881145216. Its totient is φ = 177881088.

The previous prime is 400121243. The next prime is 400121261. The reversal of 400121248 is 842121004.

It is not an unprimeable number, because it can be changed into a prime (400121243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1413715 + ... + 1413997.

It is an arithmetic number, because the mean of its divisors is an integer number (9178596).

Almost surely, 2^400121248 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 400121248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (440572608).

400121248 is an abundant number, since it is smaller than the sum of its proper divisors (481023968).

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

400121248 is a wasteful number, since it uses less digits than its factorization.

400121248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 400121248 is about 20003.0309703305. The cubic root of 400121248 is about 736.8807391158.

The spelling of 400121248 in words is "four hundred million, one hundred twenty-one thousand, two hundred forty-eight".