2643333240 has 32 divisors (see below), whose sum is σ = 7930000080. Its totient is φ = 704888832.

The previous prime is 2643333233. The next prime is 2643333269. The reversal of 2643333240 is 423333462.

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

It is a junction number, because it is equal to n+sod(n) for n = 2643333198 and 2643333207.

It is a congruent number.

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, 11013769 + ... + 11014008.

Almost surely, 2^2643333240 is an apocalyptic number.

2643333240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2643333240 is an abundant number, since it is smaller than the sum of its proper divisors (5286666840).

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

2643333240 is a wasteful number, since it uses less digits than its factorization.

2643333240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22027791 (or 22027787 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 30.

The square root of 2643333240 is about 51413.3566303543. The cubic root of 2643333240 is about 1382.6660705403. Note that the first 3 decimals are identical.

The spelling of 2643333240 in words is "two billion, six hundred forty-three million, three hundred thirty-three thousand, two hundred forty".