2788505 has 8 divisors (see below), whose sum is σ = 3436872. Its totient is φ = 2170368.

The previous prime is 2788483. The next prime is 2788523. The reversal of 2788505 is 5058872.

It can be written as a sum of positive squares in 4 ways, for example, as 737881 + 2050624 = 859^2 + 1432^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2788505 - 2¹⁰ = 2787481 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹³ + 7⁷ + 8 + 8³ + 5⁵ + 0 + 5⁹ .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7352 + ... + 7721.

It is an arithmetic number, because the mean of its divisors is an integer number (429609).

2^2788505 is an apocalyptic number.

It is an amenable number.

2788505 is a deficient number, since it is larger than the sum of its proper divisors (648367).

2788505 is a wasteful number, since it uses less digits than its factorization.

2788505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15115.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 2788505 is about 1669.8817323391. The cubic root of 2788505 is about 140.7528322389.

The spelling of 2788505 in words is "two million, seven hundred eighty-eight thousand, five hundred five".