2858423640 has 128 divisors (see below), whose sum is σ = 8689671360. Its totient is φ = 752154624.

The previous prime is 2858423629. The next prime is 2858423683. The reversal of 2858423640 is 463248582.

It is a junction number, because it is equal to n+sod(n) for n = 2858423592 and 2858423601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3258882 + ... + 3259758.

Almost surely, 2^2858423640 is an apocalyptic number.

2858423640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2858423640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4344835680).

2858423640 is an abundant number, since it is smaller than the sum of its proper divisors (5831247720).

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

2858423640 is a wasteful number, since it uses less digits than its factorization.

2858423640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221 (or 1217 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The square root of 2858423640 is about 53464.2276667306. The cubic root of 2858423640 is about 1419.1954114189.

The spelling of 2858423640 in words is "two billion, eight hundred fifty-eight million, four hundred twenty-three thousand, six hundred forty".