2585800440 has 96 divisors (see below), whose sum is σ = 8846182800. Its totient is φ = 653253120.

The previous prime is 2585800417. The next prime is 2585800499. The reversal of 2585800440 is 440085852.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2585800395 and 2585800404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182181 + ... + 195860.

Almost surely, 2^2585800440 is an apocalyptic number.

2585800440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2585800440 is an abundant number, since it is smaller than the sum of its proper divisors (6260382360).

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

2585800440 is a wasteful number, since it uses less digits than its factorization.

2585800440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378077 (or 378070 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 2585800440 is about 50850.7663659064. The cubic root of 2585800440 is about 1372.5610432006.

The spelling of 2585800440 in words is "two billion, five hundred eighty-five million, eight hundred thousand, four hundred forty".