1925897220 has 72 divisors (see below), whose sum is σ = 6291271896. Its totient is φ = 474066432.

The previous prime is 1925897219. The next prime is 1925897243. The reversal of 1925897220 is 227985291.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 32080896 + 1893816324 = 5664^2 + 43518^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 409177 + ... + 413856.

Almost surely, 2^1925897220 is an apocalyptic number.

1925897220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1925897220 is an abundant number, since it is smaller than the sum of its proper divisors (4365374676).

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

1925897220 is a wasteful number, since it uses less digits than its factorization.

1925897220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823061 (or 823056 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 1925897220 is about 43885.0455166677. The cubic root of 1925897220 is about 1244.1642041218.

It can be divided in two parts, 192589 and 7220, that added together give a square (199809 = 447²).

The spelling of 1925897220 in words is "one billion, nine hundred twenty-five million, eight hundred ninety-seven thousand, two hundred twenty".