2643800240 has 40 divisors (see below), whose sum is σ = 6207714288. Its totient is φ = 1047046400.

The previous prime is 2643800231. The next prime is 2643800273. The reversal of 2643800240 is 420083462.

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

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, 155522 + ... + 171681.

Almost surely, 2^2643800240 is an apocalyptic number.

2643800240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2643800240 is an abundant number, since it is smaller than the sum of its proper divisors (3563914048).

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

2643800240 is a wasteful number, since it uses less digits than its factorization.

2643800240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327317 (or 327311 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 2643800240 is about 51417.8980511650. The cubic root of 2643800240 is about 1382.7474913544.

The spelling of 2643800240 in words is "two billion, six hundred forty-three million, eight hundred thousand, two hundred forty".