2728578 has 8 divisors (see below), whose sum is σ = 5457168. Its totient is φ = 909524.

The previous prime is 2728577. The next prime is 2728603. The reversal of 2728578 is 8758272.

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

2728578 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2728577) 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, 227376 + ... + 227387.

It is an arithmetic number, because the mean of its divisors is an integer number (682146).

2^2728578 is an apocalyptic number.

2728578 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.

2728578 is a wasteful number, since it uses less digits than its factorization.

2728578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454768.

The product of its digits is 62720, while the sum is 39.

The square root of 2728578 is about 1651.8407913597. The cubic root of 2728578 is about 139.7372281897.

The spelling of 2728578 in words is "two million, seven hundred twenty-eight thousand, five hundred seventy-eight".