1397748952 has 8 divisors (see below), whose sum is σ = 2620779300. Its totient is φ = 698874472.

The previous prime is 1397748949. The next prime is 1397748983. The reversal of 1397748952 is 2598477931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1397748893 and 1397748902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87359302 + ... + 87359317.

Almost surely, 2^1397748952 is an apocalyptic number.

It is an amenable number.

1397748952 is a deficient number, since it is larger than the sum of its proper divisors (1223030348).

1397748952 is a wasteful number, since it uses less digits than its factorization.

1397748952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174718625 (or 174718621 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 55.

The square root of 1397748952 is about 37386.4808721013. The cubic root of 1397748952 is about 1118.0890436555.

The spelling of 1397748952 in words is "one billion, three hundred ninety-seven million, seven hundred forty-eight thousand, nine hundred fifty-two".