67729986 has 48 divisors (see below), whose sum is σ = 157405920. Its totient is φ = 21585960.

The previous prime is 67729973. The next prime is 67729999. The reversal of 67729986 is 68992776.

It is an interprime number because it is at equal distance from previous prime (67729973) and next prime (67729999).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27381 + ... + 29751.

It is an arithmetic number, because the mean of its divisors is an integer number (3279290).

Almost surely, 2^67729986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67729986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78702960).

67729986 is an abundant number, since it is smaller than the sum of its proper divisors (89675934).

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

67729986 is a wasteful number, since it uses less digits than its factorization.

67729986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428 (or 2399 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 67729986 is about 8229.8229628589. The cubic root of 67729986 is about 407.6245464712.

The spelling of 67729986 in words is "sixty-seven million, seven hundred twenty-nine thousand, nine hundred eighty-six".