2709978 has 8 divisors (see below), whose sum is σ = 5419968. Its totient is φ = 903324.

The previous prime is 2709923. The next prime is 2710003. The reversal of 2709978 is 8799072.

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

2709978 is an admirable number.

It is a d-powerful number, because it can be written as 2 + 7⁷ + 0 + 9⁶ + 9⁶ + 7⁷ + 8 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225826 + ... + 225837.

It is an arithmetic number, because the mean of its divisors is an integer number (677496).

2^2709978 is an apocalyptic number.

2709978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2709978 is a wasteful number, since it uses less digits than its factorization.

2709978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451668.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 2709978 is about 1646.2010812777. The cubic root of 2709978 is about 139.4189866325.

The spelling of 2709978 in words is "two million, seven hundred nine thousand, nine hundred seventy-eight".