2136440 has 16 divisors (see below), whose sum is σ = 4807080. Its totient is φ = 854560.

The previous prime is 2136439. The next prime is 2136451. The reversal of 2136440 is 446312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a d-powerful number, because it can be written as 2⁵ + 1 + 3¹³ + 6⁷ + 4 + 4⁹ + 0 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26666 + ... + 26745.

2^2136440 is an apocalyptic number.

2136440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2136440 is an abundant number, since it is smaller than the sum of its proper divisors (2670640).

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

2136440 is a wasteful number, since it uses less digits than its factorization.

2136440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53422 (or 53418 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2136440 is about 1461.6565944161. The cubic root of 2136440 is about 128.7943762574.

The spelling of 2136440 in words is "two million, one hundred thirty-six thousand, four hundred forty".