1896389725 has 6 divisors (see below), whose sum is σ = 2351523290. Its totient is φ = 1517111760.

The previous prime is 1896389723. The next prime is 1896389743. The reversal of 1896389725 is 5279836981.

It can be written as a sum of positive squares in 3 ways, for example, as 8139609 + 1888250116 = 2853^2 + 43454^2 .

It is not a de Polignac number, because 1896389725 - 2¹ = 1896389723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1896389725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1896389723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37927770 + ... + 37927819.

Almost surely, 2^1896389725 is an apocalyptic number.

It is an amenable number.

1896389725 is a deficient number, since it is larger than the sum of its proper divisors (455133565).

1896389725 is an equidigital number, since it uses as much as digits as its factorization.

1896389725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75855599 (or 75855594 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 58.

The square root of 1896389725 is about 43547.5570497359. The cubic root of 1896389725 is about 1237.7773496642. Note that the first 3 decimals are identical.

The spelling of 1896389725 in words is "one billion, eight hundred ninety-six million, three hundred eighty-nine thousand, seven hundred twenty-five".