1399375538 has 32 divisors (see below), whose sum is σ = 2312478720. Its totient is φ = 629836560.

The previous prime is 1399375487. The next prime is 1399375543. The reversal of 1399375538 is 8355739931.

It is a self number, because there is not a number n which added to its sum of digits gives 1399375538.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1286831 + ... + 1287917.

It is an arithmetic number, because the mean of its divisors is an integer number (72264960).

Almost surely, 2^1399375538 is an apocalyptic number.

1399375538 is a deficient number, since it is larger than the sum of its proper divisors (913103182).

1399375538 is a wasteful number, since it uses less digits than its factorization.

1399375538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622.

The product of its digits is 3061800, while the sum is 53.

The square root of 1399375538 is about 37408.2282125203. The cubic root of 1399375538 is about 1118.5225890753.

The spelling of 1399375538 in words is "one billion, three hundred ninety-nine million, three hundred seventy-five thousand, five hundred thirty-eight".