1628746825 has 12 divisors (see below), whose sum is σ = 2031744960. Its totient is φ = 1295191760.

The previous prime is 1628746729. The next prime is 1628746843. The reversal of 1628746825 is 5286478261.

It is a de Polignac number, because none of the positive numbers 2^k-1628746825 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190885 + ... + 199234.

It is an arithmetic number, because the mean of its divisors is an integer number (169312080).

Almost surely, 2^1628746825 is an apocalyptic number.

It is an amenable number.

1628746825 is a deficient number, since it is larger than the sum of its proper divisors (402998135).

1628746825 is a wasteful number, since it uses less digits than its factorization.

1628746825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390296 (or 390291 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 49.

The square root of 1628746825 is about 40357.7356277579. The cubic root of 1628746825 is about 1176.5702440692.

The spelling of 1628746825 in words is "one billion, six hundred twenty-eight million, seven hundred forty-six thousand, eight hundred twenty-five".