2228978 has 4 divisors (see below), whose sum is σ = 3343470. Its totient is φ = 1114488.

The previous prime is 2228971. The next prime is 2228981. The reversal of 2228978 is 8798222.

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

It can be written as a sum of positive squares in only one way, i.e., 1545049 + 683929 = 1243^2 + 827^2 .

It is a d-powerful number, because it can be written as 2 + 2¹⁷ + 2²¹ + 8 + 9³ + 7 + 8 .

It is not an unprimeable number, because it can be changed into a prime (2228971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557243 + ... + 557246.

2^2228978 is an apocalyptic number.

2228978 is a deficient number, since it is larger than the sum of its proper divisors (1114492).

2228978 is a wasteful number, since it uses less digits than its factorization.

2228978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114491.

The product of its digits is 32256, while the sum is 38.

The square root of 2228978 is about 1492.9762221817. The cubic root of 2228978 is about 130.6276941364.

The spelling of 2228978 in words is "two million, two hundred twenty-eight thousand, nine hundred seventy-eight".