2642697240 has 64 divisors (see below), whose sum is σ = 8272800000. Its totient is φ = 674078592.

The previous prime is 2642697229. The next prime is 2642697241. The reversal of 2642697240 is 427962462.

It is a junction number, because it is equal to n+sod(n) for n = 2642697192 and 2642697201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2642697241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475990 + ... + 481509.

It is an arithmetic number, because the mean of its divisors is an integer number (129262500).

Almost surely, 2^2642697240 is an apocalyptic number.

2642697240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2642697240 is an abundant number, since it is smaller than the sum of its proper divisors (5630102760).

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

2642697240 is a wasteful number, since it uses less digits than its factorization.

2642697240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957536 (or 957532 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 2642697240 is about 51407.1710950914. The cubic root of 2642697240 is about 1382.5551693815. Note that the first 3 decimals are identical.

The spelling of 2642697240 in words is "two billion, six hundred forty-two million, six hundred ninety-seven thousand, two hundred forty".