400243308 has 48 divisors (see below), whose sum is σ = 996123744. Its totient is φ = 124641280.

The previous prime is 400243289. The next prime is 400243331. The reversal of 400243308 is 803342004.

It is a super-4 number, since 4×400243308⁴ (a number of 36 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20788 + ... + 35108.

It is an arithmetic number, because the mean of its divisors is an integer number (20752578).

Almost surely, 2^400243308 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 400243308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498061872).

400243308 is an abundant number, since it is smaller than the sum of its proper divisors (595880436).

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

400243308 is a wasteful number, since it uses less digits than its factorization.

400243308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14482 (or 14480 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 400243308 is about 20006.0817753002. The cubic root of 400243308 is about 736.9556618373.

The spelling of 400243308 in words is "four hundred million, two hundred forty-three thousand, three hundred eight".