2780998 has 16 divisors (see below), whose sum is σ = 4608576. Its totient is φ = 1248040.

The previous prime is 2780993. The next prime is 2781001. The reversal of 2780998 is 8990872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1065 + ... + 2587.

It is an arithmetic number, because the mean of its divisors is an integer number (288036).

2^2780998 is an apocalyptic number.

2780998 is a deficient number, since it is larger than the sum of its proper divisors (1827578).

2780998 is a wasteful number, since it uses less digits than its factorization.

2780998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1619.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 2780998 is about 1667.6324535101. The cubic root of 2780998 is about 140.6264107184.

The spelling of 2780998 in words is "two million, seven hundred eighty thousand, nine hundred ninety-eight".