1393257488 has 40 divisors (see below), whose sum is σ = 3087094080. Its totient is φ = 596718720.

The previous prime is 1393257427. The next prime is 1393257497. The reversal of 1393257488 is 8847523931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224183 + ... + 230313.

It is an arithmetic number, because the mean of its divisors is an integer number (77177352).

Almost surely, 2^1393257488 is an apocalyptic number.

It is an amenable number.

1393257488 is an abundant number, since it is smaller than the sum of its proper divisors (1693836592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1393257488 is a wasteful number, since it uses less digits than its factorization.

1393257488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8175 (or 8169 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The square root of 1393257488 is about 37326.3645162504. The cubic root of 1393257488 is about 1116.8901527990.

The spelling of 1393257488 in words is "one billion, three hundred ninety-three million, two hundred fifty-seven thousand, four hundred eighty-eight".