2861900 has 18 divisors (see below), whose sum is σ = 6210540. Its totient is φ = 1144720.

The previous prime is 2861897. The next prime is 2861909. The reversal of 2861900 is 91682.

It is a super-2 number, since 2×2861900² = 16380943220000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2861900.

It is not an unprimeable number, because it can be changed into a prime (2861909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14210 + ... + 14409.

It is an arithmetic number, because the mean of its divisors is an integer number (345030).

2^2861900 is an apocalyptic number.

2861900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2861900 is an abundant number, since it is smaller than the sum of its proper divisors (3348640).

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

2861900 is a wasteful number, since it uses less digits than its factorization.

2861900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28633 (or 28626 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 2861900 is about 1691.7151060388. The cubic root of 2861900 is about 141.9770511086.

The spelling of 2861900 in words is "two million, eight hundred sixty-one thousand, nine hundred".