2878785 has 96 divisors (see below), whose sum is σ = 6639360. Its totient is φ = 1119744.

The previous prime is 2878783. The next prime is 2878793. The reversal of 2878785 is 5878782.

It is a happy number.

It is not a de Polignac number, because 2878785 - 2¹ = 2878783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2878785.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878783) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 77787 + ... + 77823.

It is an arithmetic number, because the mean of its divisors is an integer number (69160).

2^2878785 is an apocalyptic number.

It is an amenable number.

2878785 is an abundant number, since it is smaller than the sum of its proper divisors (3760575).

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

2878785 is a wasteful number, since it uses less digits than its factorization.

2878785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 84 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 2878785 is about 1696.6982642768. The cubic root of 2878785 is about 142.2557218405.

It can be divided in two parts, 2878 and 785, that added together give a palindrome (3663).

The spelling of 2878785 in words is "two million, eight hundred seventy-eight thousand, seven hundred eighty-five".