1390359728 has 10 divisors (see below), whose sum is σ = 2693822004. Its totient is φ = 695179856.

The previous prime is 1390359709. The next prime is 1390359743. The reversal of 1390359728 is 8279530931.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43448726 + ... + 43448757.

Almost surely, 2^1390359728 is an apocalyptic number.

It is an amenable number.

1390359728 is a deficient number, since it is larger than the sum of its proper divisors (1303462276).

1390359728 is an equidigital number, since it uses as much as digits as its factorization.

1390359728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86897491 (or 86897485 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 1390359728 is about 37287.5277807473. The cubic root of 1390359728 is about 1116.1152957881.

The spelling of 1390359728 in words is "one billion, three hundred ninety million, three hundred fifty-nine thousand, seven hundred twenty-eight".