1925696640 has 128 divisors (see below), whose sum is σ = 7015086720. Its totient is φ = 440156160.

The previous prime is 1925696629. The next prime is 1925696677. The reversal of 1925696640 is 466965291.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1925696640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58201 + ... + 85080.

It is an arithmetic number, because the mean of its divisors is an integer number (54805365).

Almost surely, 2^1925696640 is an apocalyptic number.

1925696640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1925696640 is an abundant number, since it is smaller than the sum of its proper divisors (5089390080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1925696640 is a wasteful number, since it uses less digits than its factorization.

1925696640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143310 (or 143298 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 48.

The square root of 1925696640 is about 43882.7601684306. The cubic root of 1925696640 is about 1244.1210098611.

The spelling of 1925696640 in words is "one billion, nine hundred twenty-five million, six hundred ninety-six thousand, six hundred forty".