978497228 has 6 divisors (see below), whose sum is σ = 1712370156. Its totient is φ = 489248612.

The previous prime is 978497189. The next prime is 978497263. The reversal of 978497228 is 822794879.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122312150 + ... + 122312157.

It is an arithmetic number, because the mean of its divisors is an integer number (285395026).

Almost surely, 2^978497228 is an apocalyptic number.

It is an amenable number.

978497228 is a deficient number, since it is larger than the sum of its proper divisors (733872928).

978497228 is a wasteful number, since it uses less digits than its factorization.

978497228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244624311 (or 244624309 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 56.

The square root of 978497228 is about 31280.9403311345. The cubic root of 978497228 is about 992.7804123213.

The spelling of 978497228 in words is "nine hundred seventy-eight million, four hundred ninety-seven thousand, two hundred twenty-eight".