2261636 has 48 divisors (see below), whose sum is σ = 4666368. Its totient is φ = 950400.

The previous prime is 2261621. The next prime is 2261639. The reversal of 2261636 is 6361622.

It is a super-2 number, since 2×2261636² = 10229994792992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (2261639) 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, 37046 + ... + 37106.

It is an arithmetic number, because the mean of its divisors is an integer number (97216).

2^2261636 is an apocalyptic number.

2261636 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2261636 is an abundant number, since it is smaller than the sum of its proper divisors (2404732).

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

2261636 is a wasteful number, since it uses less digits than its factorization.

2261636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 130 counting only the distinct ones).

The product of its digits is 2592, while the sum is 26.

The square root of 2261636 is about 1503.8736649067. The cubic root of 2261636 is about 131.2625699224.

The spelling of 2261636 in words is "two million, two hundred sixty-one thousand, six hundred thirty-six".