2785140 has 36 divisors (see below), whose sum is σ = 8448804. Its totient is φ = 742656.

The previous prime is 2785129. The next prime is 2785157. The reversal of 2785140 is 415872.

It can be written as a sum of positive squares in 2 ways, for example, as 1089936 + 1695204 = 1044^2 + 1302^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7557 + ... + 7916.

It is an arithmetic number, because the mean of its divisors is an integer number (234689).

2^2785140 is an apocalyptic number.

2785140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2785140 is an abundant number, since it is smaller than the sum of its proper divisors (5663664).

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

2785140 is a wasteful number, since it uses less digits than its factorization.

2785140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15488 (or 15483 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2785140 is about 1668.8738718070. The cubic root of 2785140 is about 140.6961921007.

The spelling of 2785140 in words is "two million, seven hundred eighty-five thousand, one hundred forty".