2639025138 has 8 divisors (see below), whose sum is σ = 5278050288. Its totient is φ = 879675044.

The previous prime is 2639025119. The next prime is 2639025139. The reversal of 2639025138 is 8315209362.

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

2639025138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 2639025096 and 2639025105.

It is not an unprimeable number, because it can be changed into a prime (2639025139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219918756 + ... + 219918767.

It is an arithmetic number, because the mean of its divisors is an integer number (659756286).

Almost surely, 2^2639025138 is an apocalyptic number.

2639025138 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.

2639025138 is a wasteful number, since it uses less digits than its factorization.

2639025138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439837528.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 2639025138 is about 51371.4428257568. The cubic root of 2639025138 is about 1381.9145061438.

The spelling of 2639025138 in words is "two billion, six hundred thirty-nine million, twenty-five thousand, one hundred thirty-eight".