2850640 has 40 divisors (see below), whose sum is σ = 7140168. Its totient is φ = 1052160.

The previous prime is 2850629. The next prime is 2850647. The reversal of 2850640 is 460582.

It can be written as a sum of positive squares in 4 ways, for example, as 1296 + 2849344 = 36^2 + 1688^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×2850640² = 16252296819200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2850647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331 + ... + 2410.

2^2850640 is an apocalyptic number.

2850640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2850640 is an abundant number, since it is smaller than the sum of its proper divisors (4289528).

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

2850640 is a wasteful number, since it uses less digits than its factorization.

2850640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2767 (or 2761 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2850640 is about 1688.3838426140. The cubic root of 2850640 is about 141.7906058789.

The spelling of 2850640 in words is "two million, eight hundred fifty thousand, six hundred forty".