2651636 has 12 divisors (see below), whose sum is σ = 4997412. Its totient is φ = 1223808.

The previous prime is 2651629. The next prime is 2651639. The reversal of 2651636 is 6361562.

2651636 = T₂₉₃ + T₂₉₄ + ... + T₃₄₄.

It can be written as a sum of positive squares in 2 ways, for example, as 155236 + 2496400 = 394^2 + 1580^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2651599 and 2651608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2651639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25445 + ... + 25548.

It is an arithmetic number, because the mean of its divisors is an integer number (416451).

2^2651636 is an apocalyptic number.

2651636 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2651636 is a deficient number, since it is larger than the sum of its proper divisors (2345776).

2651636 is a wasteful number, since it uses less digits than its factorization.

2651636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51010 (or 51008 counting only the distinct ones).

The product of its digits is 6480, while the sum is 29.

The square root of 2651636 is about 1628.3844754848. The cubic root of 2651636 is about 138.4112217615.

The spelling of 2651636 in words is "two million, six hundred fifty-one thousand, six hundred thirty-six".