981824478 has 16 divisors (see below), whose sum is σ = 1975001616. Its totient is φ = 325382720.

The previous prime is 981824429. The next prime is 981824479. The reversal of 981824478 is 874428189.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 981824478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981824479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471903 + ... + 473978.

It is an arithmetic number, because the mean of its divisors is an integer number (123437601).

Almost surely, 2^981824478 is an apocalyptic number.

981824478 is an abundant number, since it is smaller than the sum of its proper divisors (993177138).

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

981824478 is a wasteful number, since it uses less digits than its factorization.

981824478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946059.

The product of its digits is 1032192, while the sum is 51.

The square root of 981824478 is about 31334.0785407837. The cubic root of 981824478 is about 993.9044119695.

The spelling of 981824478 in words is "nine hundred eighty-one million, eight hundred twenty-four thousand, four hundred seventy-eight".