1628789025 has 24 divisors (see below), whose sum is σ = 2765717824. Its totient is φ = 845208000.

The previous prime is 1628789021. The next prime is 1628789039. The reversal of 1628789025 is 5209878261.

It is not a de Polignac number, because 1628789025 - 2² = 1628789021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1628789021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 290701 + ... + 296250.

Almost surely, 2^1628789025 is an apocalyptic number.

1628789025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1628789025 is a deficient number, since it is larger than the sum of its proper divisors (1136928799).

1628789025 is a wasteful number, since it uses less digits than its factorization.

1628789025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587001 (or 586996 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 1628789025 is about 40358.2584485505. The cubic root of 1628789025 is about 1176.5804054265.

It can be divided in two parts, 1628 and 789025, that added together give a triangular number (790653 = T₁₂₅₇).

The spelling of 1628789025 in words is "one billion, six hundred twenty-eight million, seven hundred eighty-nine thousand, twenty-five".