2579994690 has 128 divisors (see below), whose sum is σ = 7667896320. Its totient is φ = 540995328.

The previous prime is 2579994679. The next prime is 2579994691. The reversal of 2579994690 is 964999752.

It is a super-2 number, since 2×2579994690² = 13312745200856392200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2579994691) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 453081 + ... + 458739.

It is an arithmetic number, because the mean of its divisors is an integer number (59905440).

Almost surely, 2^2579994690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2579994690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3833948160).

2579994690 is an abundant number, since it is smaller than the sum of its proper divisors (5087901630).

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

2579994690 is a wasteful number, since it uses less digits than its factorization.

2579994690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5856.

The product of its (nonzero) digits is 11022480, while the sum is 60.

The square root of 2579994690 is about 50793.6481265128. The cubic root of 2579994690 is about 1371.5330291374.

The spelling of 2579994690 in words is "two billion, five hundred seventy-nine million, nine hundred ninety-four thousand, six hundred ninety".