2150640 has 120 divisors (see below), whose sum is σ = 7544160. Its totient is φ = 548352.

The previous prime is 2150639. The next prime is 2150641. The reversal of 2150640 is 460512.

It is a happy number.

2150640 is a `hidden beast` number, since 21 + 5 + 0 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (2150639) and next prime (2150641).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20829 + ... + 20931.

It is an arithmetic number, because the mean of its divisors is an integer number (62868).

2^2150640 is an apocalyptic number.

2150640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2150640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3772080).

2150640 is an abundant number, since it is smaller than the sum of its proper divisors (5393520).

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

2150640 is a wasteful number, since it uses less digits than its factorization.

2150640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 2150640 is about 1466.5060518116. The cubic root of 2150640 is about 129.0790933743.

The spelling of 2150640 in words is "two million, one hundred fifty thousand, six hundred forty".