978820227 has 96 divisors (see below), whose sum is σ = 1860917760. Its totient is φ = 502770240.

The previous prime is 978820153. The next prime is 978820243. The reversal of 978820227 is 722028879.

It is a happy number.

It is not a de Polignac number, because 978820227 - 2¹² = 978816131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (978820627) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1498633 + ... + 1499285.

It is an arithmetic number, because the mean of its divisors is an integer number (19384560).

Almost surely, 2^978820227 is an apocalyptic number.

978820227 is a deficient number, since it is larger than the sum of its proper divisors (882097533).

978820227 is a wasteful number, since it uses less digits than its factorization.

978820227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 978820227 is about 31286.1027774314. The cubic root of 978820227 is about 992.8896382492.

The spelling of 978820227 in words is "nine hundred seventy-eight million, eight hundred twenty thousand, two hundred twenty-seven".