400143308 has 12 divisors (see below), whose sum is σ = 719176752. Its totient is φ = 194664240.

The previous prime is 400143307. The next prime is 400143311. The reversal of 400143308 is 803341004.

It is a super-2 number, since 2×400143308² = 320229333874365728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400143301) 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, 1351688 + ... + 1351983.

It is an arithmetic number, because the mean of its divisors is an integer number (59931396).

Almost surely, 2^400143308 is an apocalyptic number.

It is an amenable number.

400143308 is a deficient number, since it is larger than the sum of its proper divisors (319033444).

400143308 is a wasteful number, since it uses less digits than its factorization.

400143308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703712 (or 2703710 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 400143308 is about 20003.5823791640. The cubic root of 400143308 is about 736.8942810862.

The spelling of 400143308 in words is "four hundred million, one hundred forty-three thousand, three hundred eight".