2870640 has 100 divisors (see below), whose sum is σ = 9992664. Its totient is φ = 763776.

The previous prime is 2870627. The next prime is 2870641. The reversal of 2870640 is 460782.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2870641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6259 + ... + 6701.

2^2870640 is an apocalyptic number.

2870640 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 2870640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4996332).

2870640 is an abundant number, since it is smaller than the sum of its proper divisors (7122024).

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

2870640 is a wasteful number, since it uses less digits than its factorization.

2870640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 2870640 is about 1694.2963141080. The cubic root of 2870640 is about 142.1214328579.

The spelling of 2870640 in words is "two million, eight hundred seventy thousand, six hundred forty".