1398971752 has 16 divisors (see below), whose sum is σ = 2777370660. Its totient is φ = 658339584.

The previous prime is 1398971731. The next prime is 1398971759. The reversal of 1398971752 is 2571798931.

It can be written as a sum of positive squares in 2 ways, for example, as 1328310916 + 70660836 = 36446^2 + 8406^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1398971752.

It is not an unprimeable number, because it can be changed into a prime (1398971759) 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, 5143143 + ... + 5143414.

Almost surely, 2^1398971752 is an apocalyptic number.

It is an amenable number.

1398971752 is a deficient number, since it is larger than the sum of its proper divisors (1378398908).

1398971752 is a wasteful number, since it uses less digits than its factorization.

1398971752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10286580 (or 10286576 counting only the distinct ones).

The product of its digits is 952560, while the sum is 52.

The square root of 1398971752 is about 37402.8308019594. The cubic root of 1398971752 is about 1118.4149965106.

The spelling of 1398971752 in words is "one billion, three hundred ninety-eight million, nine hundred seventy-one thousand, seven hundred fifty-two".