2500030640 has 40 divisors (see below), whose sum is σ = 6118499760. Its totient is φ = 947379456.

The previous prime is 2500030601. The next prime is 2500030651. The reversal of 2500030640 is 460300052.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820859 + ... + 823898.

It is an arithmetic number, because the mean of its divisors is an integer number (152962494).

Almost surely, 2^2500030640 is an apocalyptic number.

2500030640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2500030640 is an abundant number, since it is smaller than the sum of its proper divisors (3618469120).

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

2500030640 is a wasteful number, since it uses less digits than its factorization.

2500030640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644789 (or 1644783 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 2500030640 is about 50000.3063990612. The cubic root of 2500030640 is about 1357.2143529252.

Adding to 2500030640 its reverse (460300052), we get a palindrome (2960330692).

The spelling of 2500030640 in words is "two billion, five hundred million, thirty thousand, six hundred forty".