2147278 has 12 divisors (see below), whose sum is σ = 3746952. Its totient is φ = 920220.

The previous prime is 2147273. The next prime is 2147279. The reversal of 2147278 is 8727412.

It is a super-2 number, since 2×2147278² = 9221605618568, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10858 + ... + 11053.

It is an arithmetic number, because the mean of its divisors is an integer number (312246).

2^2147278 is an apocalyptic number.

2147278 is a deficient number, since it is larger than the sum of its proper divisors (1599674).

2147278 is a wasteful number, since it uses less digits than its factorization.

2147278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21927 (or 21920 counting only the distinct ones).

The product of its digits is 6272, while the sum is 31.

The square root of 2147278 is about 1465.3593415951. The cubic root of 2147278 is about 129.0117970903.

The spelling of 2147278 in words is "two million, one hundred forty-seven thousand, two hundred seventy-eight".