2169240 has 32 divisors (see below), whose sum is σ = 6508080. Its totient is φ = 578432.

The previous prime is 2169227. The next prime is 2169281. The reversal of 2169240 is 429612.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 2169240.

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, 8919 + ... + 9158.

2^2169240 is an apocalyptic number.

2169240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2169240 is an abundant number, since it is smaller than the sum of its proper divisors (4338840).

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

2169240 is a wasteful number, since it uses less digits than its factorization.

2169240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18091 (or 18087 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 2169240 is about 1472.8340028666. The cubic root of 2169240 is about 129.4501430494.

The spelling of 2169240 in words is "two million, one hundred sixty-nine thousand, two hundred forty".