2636420 has 24 divisors (see below), whose sum is σ = 5629848. Its totient is φ = 1036800.

The previous prime is 2636407. The next prime is 2636437. The reversal of 2636420 is 246362.

It can be written as a sum of positive squares in 4 ways, for example, as 18496 + 2617924 = 136^2 + 1618^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140 + ... + 2300.

It is an arithmetic number, because the mean of its divisors is an integer number (234577).

2^2636420 is an apocalyptic number.

2636420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2636420 is an abundant number, since it is smaller than the sum of its proper divisors (2993428).

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

2636420 is a wasteful number, since it uses less digits than its factorization.

2636420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 2636420 is about 1623.7056383470. The cubic root of 2636420 is about 138.1459633218.

The spelling of 2636420 in words is "two million, six hundred thirty-six thousand, four hundred twenty".