1978228228 has 12 divisors (see below), whose sum is σ = 3520576080. Its totient is φ = 972349352.

The previous prime is 1978228211. The next prime is 1978228237. The reversal of 1978228228 is 8228228791.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4190926 + ... + 4191397.

It is an arithmetic number, because the mean of its divisors is an integer number (293381340).

Almost surely, 2^1978228228 is an apocalyptic number.

It is an amenable number.

1978228228 is a deficient number, since it is larger than the sum of its proper divisors (1542347852).

1978228228 is a wasteful number, since it uses less digits than its factorization.

1978228228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8382386 (or 8382384 counting only the distinct ones).

The product of its digits is 516096, while the sum is 49.

The square root of 1978228228 is about 44477.2776594971. The cubic root of 1978228228 is about 1255.3325738817.

The spelling of 1978228228 in words is "one billion, nine hundred seventy-eight million, two hundred twenty-eight thousand, two hundred twenty-eight".