78866046 has 96 divisors (see below), whose sum is σ = 205510656. Its totient is φ = 21384000.

The previous prime is 78866041. The next prime is 78866069. The reversal of 78866046 is 64066887.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 78865992 and 78866010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78866041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 238101 + ... + 238431.

It is an arithmetic number, because the mean of its divisors is an integer number (2140736).

Almost surely, 2^78866046 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78866046, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102755328).

78866046 is an abundant number, since it is smaller than the sum of its proper divisors (126644610).

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

78866046 is a wasteful number, since it uses less digits than its factorization.

78866046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 435 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 78866046 is about 8880.6557190334. The cubic root of 78866046 is about 428.8413843010.

The spelling of 78866046 in words is "seventy-eight million, eight hundred sixty-six thousand, forty-six".