1925806428 has 480 divisors, whose sum is σ = 6678425600. Its totient is φ = 480090240.

The previous prime is 1925806411. The next prime is 1925806429. The reversal of 1925806428 is 8246085291.

1925806428 is a `hidden beast` number, since 1 + 9 + 2 + 580 + 64 + 2 + 8 = 666.

It is a super-2 number, since 2×1925806428² = 7417460796252238368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1925806429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 44786175 + ... + 44786217.

Almost surely, 2^1925806428 is an apocalyptic number.

1925806428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1925806428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3339212800).

1925806428 is an abundant number, since it is smaller than the sum of its proper divisors (4752619172).

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

1925806428 is a wasteful number, since it uses less digits than its factorization.

1925806428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 1925806428 is about 43884.0110746500. The cubic root of 1925806428 is about 1244.1446527269.

The spelling of 1925806428 in words is "one billion, nine hundred twenty-five million, eight hundred six thousand, four hundred twenty-eight".