2626780638 has 8 divisors (see below), whose sum is σ = 5253561288. Its totient is φ = 875593544.

The previous prime is 2626780613. The next prime is 2626780649. The reversal of 2626780638 is 8360876262.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

2626780638 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218898381 + ... + 218898392.

It is an arithmetic number, because the mean of its divisors is an integer number (656695161).

Almost surely, 2^2626780638 is an apocalyptic number.

2626780638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2626780638 is a wasteful number, since it uses less digits than its factorization.

2626780638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437796778.

The product of its (nonzero) digits is 1161216, while the sum is 48.

The square root of 2626780638 is about 51252.1281314249. The cubic root of 2626780638 is about 1379.7739316721.

The spelling of 2626780638 in words is "two billion, six hundred twenty-six million, seven hundred eighty thousand, six hundred thirty-eight".