1025637880 has 80 divisors (see below), whose sum is σ = 2459900520. Its totient is φ = 384864768.

The previous prime is 1025637859. The next prime is 1025637911. The reversal of 1025637880 is 887365201.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3340687 + ... + 3340993.

Almost surely, 2^1025637880 is an apocalyptic number.

1025637880 is a gapful number since it is divisible by the number (10) 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 1025637880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1229950260).

1025637880 is an abundant number, since it is smaller than the sum of its proper divisors (1434262640).

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

1025637880 is an frugal number, since it uses more digits than its factorization.

1025637880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 1025637880 is about 32025.5816496750. The cubic root of 1025637880 is about 1008.4739493505.

The spelling of 1025637880 in words is "one billion, twenty-five million, six hundred thirty-seven thousand, eight hundred eighty".