2775990 has 32 divisors (see below), whose sum is σ = 7614720. Its totient is φ = 634464.

The previous prime is 2775989. The next prime is 2775991. The reversal of 2775990 is 995772.

It is an interprime number because it is at equal distance from previous prime (2775989) and next prime (2775991).

It is a super-2 number, since 2×2775990² = 15412240960200, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2775991) 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 15 ways as a sum of consecutive naturals, for example, 6400 + ... + 6819.

It is an arithmetic number, because the mean of its divisors is an integer number (237960).

2^2775990 is an apocalyptic number.

2775990 is an abundant number, since it is smaller than the sum of its proper divisors (4838730).

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

2775990 is a wasteful number, since it uses less digits than its factorization.

2775990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13236.

The product of its (nonzero) digits is 39690, while the sum is 39.

The square root of 2775990 is about 1666.1302470095. The cubic root of 2775990 is about 140.5419470080.

The spelling of 2775990 in words is "two million, seven hundred seventy-five thousand, nine hundred ninety".