1396890625 has 63 divisors (see below), whose sum is σ = 1976517669. Its totient is φ = 986700000.

The previous prime is 1396890617. The next prime is 1396890643. The reversal of 1396890625 is 5260986931.

The square root of 1396890625 is 37375.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 10 ways, for example, as 655308801 + 741581824 = 25599^2 + 27232^2 .

It is not a de Polignac number, because 1396890625 - 2³ = 1396890617 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 60734364 + ... + 60734386.

Almost surely, 2^1396890625 is an apocalyptic number.

1396890625 is the 37375-th square number.

1396890625 is the 18688-th centered octagonal number.

It is an amenable number.

1396890625 is a deficient number, since it is larger than the sum of its proper divisors (579627044).

1396890625 is an frugal number, since it uses more digits than its factorization.

1396890625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 49.

The cubic root of 1396890625 is about 1117.8601321329.

Multiplying 1396890625 by its sum of digits (49), we get a square (68447640625 = 261625²).

The spelling of 1396890625 in words is "one billion, three hundred ninety-six million, eight hundred ninety thousand, six hundred twenty-five".