1625973888 has 256 divisors, whose sum is σ = 5439651840. Its totient is φ = 418037760.

The previous prime is 1625973809. The next prime is 1625973893. The reversal of 1625973888 is 8883795261.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3754920 + ... + 3755352.

It is an arithmetic number, because the mean of its divisors is an integer number (21248640).

Almost surely, 2^1625973888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1625973888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2719825920).

1625973888 is an abundant number, since it is smaller than the sum of its proper divisors (3813677952).

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

1625973888 is a wasteful number, since it uses less digits than its factorization.

1625973888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595 (or 583 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 57.

The square root of 1625973888 is about 40323.3665261223. The cubic root of 1625973888 is about 1175.9021622525.

The spelling of 1625973888 in words is "one billion, six hundred twenty-five million, nine hundred seventy-three thousand, eight hundred eighty-eight".