1978367328 has 120 divisors (see below), whose sum is σ = 6649573392. Its totient is φ = 565242624.

The previous prime is 1978367309. The next prime is 1978367341. The reversal of 1978367328 is 8237638791.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36375 + ... + 72662.

Almost surely, 2^1978367328 is an apocalyptic number.

1978367328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1978367328 is an abundant number, since it is smaller than the sum of its proper divisors (4671206064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1978367328 is a wasteful number, since it uses less digits than its factorization.

1978367328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109066 (or 109049 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 1978367328 is about 44478.8413518158. The cubic root of 1978367328 is about 1255.3619962820.

The spelling of 1978367328 in words is "one billion, nine hundred seventy-eight million, three hundred sixty-seven thousand, three hundred twenty-eight".