398143772 has 12 divisors (see below), whose sum is σ = 750347976. Its totient is φ = 183758640.

The previous prime is 398143771. The next prime is 398143787. The reversal of 398143772 is 277341893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398143771) 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, 3828254 + ... + 3828357.

It is an arithmetic number, because the mean of its divisors is an integer number (62528998).

Almost surely, 2^398143772 is an apocalyptic number.

It is an amenable number.

398143772 is a deficient number, since it is larger than the sum of its proper divisors (352204204).

398143772 is a wasteful number, since it uses less digits than its factorization.

398143772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7656628 (or 7656626 counting only the distinct ones).

The product of its digits is 254016, while the sum is 44.

The square root of 398143772 is about 19953.5403374940. The cubic root of 398143772 is about 735.6647984273.

The spelling of 398143772 in words is "three hundred ninety-eight million, one hundred forty-three thousand, seven hundred seventy-two".