1398736172 has 12 divisors (see below), whose sum is σ = 2452186800. Its totient is φ = 698111376.

The previous prime is 1398736147. The next prime is 1398736211. The reversal of 1398736172 is 2716378931.

It is a super-2 number, since 2×1398736172² = 3912925757722427168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311672 + ... + 316127.

It is an arithmetic number, because the mean of its divisors is an integer number (204348900).

Almost surely, 2^1398736172 is an apocalyptic number.

It is an amenable number.

1398736172 is a deficient number, since it is larger than the sum of its proper divisors (1053450628).

1398736172 is a wasteful number, since it uses less digits than its factorization.

1398736172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628360 (or 628358 counting only the distinct ones).

The product of its digits is 381024, while the sum is 47.

The square root of 1398736172 is about 37399.6814424936. The cubic root of 1398736172 is about 1118.3522144482.

The spelling of 1398736172 in words is "one billion, three hundred ninety-eight million, seven hundred thirty-six thousand, one hundred seventy-two".