164232978 has 96 divisors (see below), whose sum is σ = 419061888. Its totient is φ = 41783040.

The previous prime is 164232917. The next prime is 164232989. The reversal of 164232978 is 879232461.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 524550 + ... + 524862.

It is an arithmetic number, because the mean of its divisors is an integer number (4365228).

Almost surely, 2^164232978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164232978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209530944).

164232978 is an abundant number, since it is smaller than the sum of its proper divisors (254828910).

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

164232978 is a wasteful number, since it uses less digits than its factorization.

164232978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 369 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 164232978 is about 12815.3415093005. The cubic root of 164232978 is about 547.6294425078.

The spelling of 164232978 in words is "one hundred sixty-four million, two hundred thirty-two thousand, nine hundred seventy-eight".