2778502 has 4 divisors (see below), whose sum is σ = 4167756. Its totient is φ = 1389250.

The previous prime is 2778481. The next prime is 2778521. The reversal of 2778502 is 2058772.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694624 + ... + 694627.

It is an arithmetic number, because the mean of its divisors is an integer number (1041939).

2^2778502 is an apocalyptic number.

2778502 is a deficient number, since it is larger than the sum of its proper divisors (1389254).

2778502 is a wasteful number, since it uses less digits than its factorization.

2778502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389253.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 2778502 is about 1666.8839191737. The cubic root of 2778502 is about 140.5843264757.

The spelling of 2778502 in words is "two million, seven hundred seventy-eight thousand, five hundred two".