978159620 has 24 divisors (see below), whose sum is σ = 2054916864. Its totient is φ = 391114976.

The previous prime is 978159619. The next prime is 978159659. The reversal of 978159620 is 26951879.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55619 + ... + 71061.

It is an arithmetic number, because the mean of its divisors is an integer number (85621536).

Almost surely, 2^978159620 is an apocalyptic number.

It is an amenable number.

978159620 is an abundant number, since it is smaller than the sum of its proper divisors (1076757244).

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

978159620 is a wasteful number, since it uses less digits than its factorization.

978159620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18619 (or 18617 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 47.

The square root of 978159620 is about 31275.5434804897. The cubic root of 978159620 is about 992.6662204923. Note that the first 3 decimals are identical.

The spelling of 978159620 in words is "nine hundred seventy-eight million, one hundred fifty-nine thousand, six hundred twenty".