1925680389 has 32 divisors (see below), whose sum is σ = 2773232640. Its totient is φ = 1184198400.

The previous prime is 1925680387. The next prime is 1925680439. The reversal of 1925680389 is 9830865291.

It is a happy number.

It is not a de Polignac number, because 1925680389 - 2¹ = 1925680387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1925680387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 646674 + ... + 649644.

It is an arithmetic number, because the mean of its divisors is an integer number (86663520).

Almost surely, 2^1925680389 is an apocalyptic number.

It is an amenable number.

1925680389 is a deficient number, since it is larger than the sum of its proper divisors (847552251).

1925680389 is a wasteful number, since it uses less digits than its factorization.

1925680389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241.

The product of its (nonzero) digits is 933120, while the sum is 51.

The square root of 1925680389 is about 43882.5750042087. The cubic root of 1925680389 is about 1244.1175101289.

The spelling of 1925680389 in words is "one billion, nine hundred twenty-five million, six hundred eighty thousand, three hundred eighty-nine".