2730978 has 24 divisors (see below), whose sum is σ = 5958108. Its totient is φ = 904032.

The previous prime is 2730967. The next prime is 2730979. The reversal of 2730978 is 8790372.

It can be written as a sum of positive squares in 2 ways, for example, as 2259009 + 471969 = 1503^2 + 687^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2730979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2676 + ... + 3552.

2^2730978 is an apocalyptic number.

2730978 is an abundant number, since it is smaller than the sum of its proper divisors (3227130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2730978 is a wasteful number, since it uses less digits than its factorization.

2730978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058 (or 1055 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 2730978 is about 1652.5670939481. The cubic root of 2730978 is about 139.7781861622.

The spelling of 2730978 in words is "two million, seven hundred thirty thousand, nine hundred seventy-eight".