2957278 has 4 divisors (see below), whose sum is σ = 4435920. Its totient is φ = 1478638.

The previous prime is 2957267. The next prime is 2957321. The reversal of 2957278 is 8727592.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2957278.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 739318 + ... + 739321.

It is an arithmetic number, because the mean of its divisors is an integer number (1108980).

2^2957278 is an apocalyptic number.

2957278 is a deficient number, since it is larger than the sum of its proper divisors (1478642).

2957278 is a wasteful number, since it uses less digits than its factorization.

2957278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478641.

The product of its digits is 70560, while the sum is 40.

The square root of 2957278 is about 1719.6738062784. The cubic root of 2957278 is about 143.5370614129.

The spelling of 2957278 in words is "two million, nine hundred fifty-seven thousand, two hundred seventy-eight".