2856240 has 60 divisors (see below), whose sum is σ = 9594624. Its totient is φ = 761472.

The previous prime is 2856229. The next prime is 2856241. The reversal of 2856240 is 426582.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (2856241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1264 + ... + 2703.

2^2856240 is an apocalyptic number.

2856240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2856240 is an abundant number, since it is smaller than the sum of its proper divisors (6738384).

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

2856240 is a wasteful number, since it uses less digits than its factorization.

2856240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986 (or 3977 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2856240 is about 1690.0414196108. The cubic root of 2856240 is about 141.8833929971.

The spelling of 2856240 in words is "two million, eight hundred fifty-six thousand, two hundred forty".