2851236 has 18 divisors (see below), whose sum is σ = 7207382. Its totient is φ = 950400.

The previous prime is 2851231. The next prime is 2851249. The reversal of 2851236 is 6321582.

It can be written as a sum of positive squares in only one way, i.e., 2742336 + 108900 = 1656^2 + 330^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (2851231) 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, 39565 + ... + 39636.

2^2851236 is an apocalyptic number.

It is an amenable number.

2851236 is an abundant number, since it is smaller than the sum of its proper divisors (4356146).

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

2851236 is a wasteful number, since it uses less digits than its factorization.

2851236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79211 (or 79206 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2851236 is about 1688.5603335386. The cubic root of 2851236 is about 141.8004868545.

It can be divided in two parts, 285 and 1236, that added together give a square (1521 = 39²).

The spelling of 2851236 in words is "two million, eight hundred fifty-one thousand, two hundred thirty-six".