1025806080 has 144 divisors (see below), whose sum is σ = 3528352800. Its totient is φ = 252493824.

The previous prime is 1025806063. The next prime is 1025806087. The reversal of 1025806080 is 806085201.

It is a super-2 number, since 2×1025806080² = 2104556227529932800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025806087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39646 + ... + 60194.

It is an arithmetic number, because the mean of its divisors is an integer number (24502450).

Almost surely, 2^1025806080 is an apocalyptic number.

1025806080 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 1025806080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1764176400).

1025806080 is an abundant number, since it is smaller than the sum of its proper divisors (2502546720).

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

1025806080 is a wasteful number, since it uses less digits than its factorization.

1025806080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20586 (or 20572 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 1025806080 is about 32028.2075677051. The cubic root of 1025806080 is about 1008.5290747347.

The spelling of 1025806080 in words is "one billion, twenty-five million, eight hundred six thousand, eighty".