2625397840 has 80 divisors (see below), whose sum is σ = 6800346000. Its totient is φ = 935940096.

The previous prime is 2625397823. The next prime is 2625397861. The reversal of 2625397840 is 487935262.

It can be written as a sum of positive squares in 8 ways, for example, as 86044176 + 2539353664 = 9276^2 + 50392^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13365 + ... + 73684.

It is an arithmetic number, because the mean of its divisors is an integer number (85004325).

Almost surely, 2^2625397840 is an apocalyptic number.

2625397840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2625397840 is an abundant number, since it is smaller than the sum of its proper divisors (4174948160).

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

2625397840 is a wasteful number, since it uses less digits than its factorization.

2625397840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87104 (or 87098 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 2625397840 is about 51238.6362035525. The cubic root of 2625397840 is about 1379.5317742190.

The spelling of 2625397840 in words is "two billion, six hundred twenty-five million, three hundred ninety-seven thousand, eight hundred forty".