1390571944 has 16 divisors (see below), whose sum is σ = 2651515200. Its totient is φ = 683501232.

The previous prime is 1390571909. The next prime is 1390571947. The reversal of 1390571944 is 4491750931.

It is a self number, because there is not a number n which added to its sum of digits gives 1390571944.

It is not an unprimeable number, because it can be changed into a prime (1390571947) 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, 1472592 + ... + 1473535.

It is an arithmetic number, because the mean of its divisors is an integer number (165719700).

Almost surely, 2^1390571944 is an apocalyptic number.

It is an amenable number.

1390571944 is a deficient number, since it is larger than the sum of its proper divisors (1260943256).

1390571944 is a wasteful number, since it uses less digits than its factorization.

1390571944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946192 (or 2946188 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1390571944 is about 37290.3733421911. The cubic root of 1390571944 is about 1116.1720785686.

It can be divided in two parts, 13905 and 71944, that added together give a square (85849 = 293²).

The spelling of 1390571944 in words is "one billion, three hundred ninety million, five hundred seventy-one thousand, nine hundred forty-four".