2778998 has 8 divisors (see below), whose sum is σ = 4349808. Its totient is φ = 1329064.

The previous prime is 2778989. The next prime is 2779001. The reversal of 2778998 is 8998772.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 30161 + ... + 30252.

It is an arithmetic number, because the mean of its divisors is an integer number (543726).

2^2778998 is an apocalyptic number.

2778998 is a deficient number, since it is larger than the sum of its proper divisors (1570810).

2778998 is a wasteful number, since it uses less digits than its factorization.

2778998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60438.

The product of its digits is 508032, while the sum is 50.

The square root of 2778998 is about 1667.0326931407. The cubic root of 2778998 is about 140.5926913760.

The spelling of 2778998 in words is "two million, seven hundred seventy-eight thousand, nine hundred ninety-eight".