2785878402 has 16 divisors (see below), whose sum is σ = 5666194080. Its totient is φ = 912886592.

The previous prime is 2785878397. The next prime is 2785878409. The reversal of 2785878402 is 2048785872.

It is a super-2 number, since 2×2785878402² = 15522236941460147208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2785878409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3934503 + ... + 3935210.

It is an arithmetic number, because the mean of its divisors is an integer number (354137130).

Almost surely, 2^2785878402 is an apocalyptic number.

2785878402 is an abundant number, since it is smaller than the sum of its proper divisors (2880315678).

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

2785878402 is a wasteful number, since it uses less digits than its factorization.

2785878402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7869777.

The product of its (nonzero) digits is 2007040, while the sum is 51.

The square root of 2785878402 is about 52781.4209926182. The cubic root of 2785878402 is about 1407.0862488923.

The spelling of 2785878402 in words is "two billion, seven hundred eighty-five million, eight hundred seventy-eight thousand, four hundred two".