2502778 has 8 divisors (see below), whose sum is σ = 3775680. Its totient is φ = 1244220.

The previous prime is 2502767. The next prime is 2502779. The reversal of 2502778 is 8772052.

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2502779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3138 + ... + 3853.

It is an arithmetic number, because the mean of its divisors is an integer number (471960).

2^2502778 is an apocalyptic number.

2502778 is a deficient number, since it is larger than the sum of its proper divisors (1272902).

2502778 is a wasteful number, since it uses less digits than its factorization.

2502778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7172.

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

The square root of 2502778 is about 1582.0170669117. The cubic root of 2502778 is about 135.7711332351.

The spelling of 2502778 in words is "two million, five hundred two thousand, seven hundred seventy-eight".