1025389872 has 240 divisors, whose sum is σ = 3293122560. Its totient is φ = 295239168.

The previous prime is 1025389861. The next prime is 1025389877. The reversal of 1025389872 is 2789835201.

It is a happy number.

1025389872 is a `hidden beast` number, since 102 + 538 + 9 + 8 + 7 + 2 = 666.

1025389872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1025389877) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4517023 + ... + 4517249.

It is an arithmetic number, because the mean of its divisors is an integer number (13721344).

Almost surely, 2^1025389872 is an apocalyptic number.

1025389872 is a gapful number since it is divisible by the number (12) 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 1025389872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1646561280).

1025389872 is an abundant number, since it is smaller than the sum of its proper divisors (2267732688).

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

1025389872 is a wasteful number, since it uses less digits than its factorization.

1025389872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1025389872 is about 32021.7093859775. The cubic root of 1025389872 is about 1008.3926569261.

The spelling of 1025389872 in words is "one billion, twenty-five million, three hundred eighty-nine thousand, eight hundred seventy-two".