398693812 has 12 divisors (see below), whose sum is σ = 761142816. Its totient is φ = 181224440.

The previous prime is 398693797. The next prime is 398693819. The reversal of 398693812 is 218396893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398693819) 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, 4530568 + ... + 4530655.

It is an arithmetic number, because the mean of its divisors is an integer number (63428568).

Almost surely, 2^398693812 is an apocalyptic number.

It is an amenable number.

398693812 is a deficient number, since it is larger than the sum of its proper divisors (362449004).

398693812 is a wasteful number, since it uses less digits than its factorization.

398693812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9061238 (or 9061236 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The square root of 398693812 is about 19967.3185981493. The cubic root of 398693812 is about 736.0034188759.

It can be divided in two parts, 39869 and 3812, that added together give a square (43681 = 209²).

The spelling of 398693812 in words is "three hundred ninety-eight million, six hundred ninety-three thousand, eight hundred twelve".