2858987778 has 16 divisors (see below), whose sum is σ = 5718612576. Its totient is φ = 952889760.

The previous prime is 2858987773. The next prime is 2858987783. The reversal of 2858987778 is 8777898582.

It is an interprime number because it is at equal distance from previous prime (2858987773) and next prime (2858987783).

It is a super-2 number, since 2×2858987778² = 16347622229506754568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2858987773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47838 + ... + 89478.

It is an arithmetic number, because the mean of its divisors is an integer number (357413286).

Almost surely, 2^2858987778 is an apocalyptic number.

2858987778 is an abundant number, since it is smaller than the sum of its proper divisors (2859624798).

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

2858987778 is a wasteful number, since it uses less digits than its factorization.

2858987778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53089.

The product of its digits is 126443520, while the sum is 69.

The square root of 2858987778 is about 53469.5032518538. The cubic root of 2858987778 is about 1419.2887693319.

The spelling of 2858987778 in words is "two billion, eight hundred fifty-eight million, nine hundred eighty-seven thousand, seven hundred seventy-eight".