2658890856 has 64 divisors (see below), whose sum is σ = 7129166400. Its totient is φ = 823799808.

The previous prime is 2658890851. The next prime is 2658890869. The reversal of 2658890856 is 6580988562.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 2658890796 and 2658890805.

It is not an unprimeable number, because it can be changed into a prime (2658890851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30841 + ... + 79176.

It is an arithmetic number, because the mean of its divisors is an integer number (111393225).

Almost surely, 2^2658890856 is an apocalyptic number.

It is an amenable number.

2658890856 is an abundant number, since it is smaller than the sum of its proper divisors (4470275544).

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

2658890856 is a wasteful number, since it uses less digits than its factorization.

2658890856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110098 (or 110094 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 57.

The square root of 2658890856 is about 51564.4340219109. The cubic root of 2658890856 is about 1385.3733749871.

The spelling of 2658890856 in words is "two billion, six hundred fifty-eight million, eight hundred ninety thousand, eight hundred fifty-six".