67029990 has 64 divisors (see below), whose sum is σ = 165970944. Its totient is φ = 17316608.

The previous prime is 67029983. The next prime is 67030013. The reversal of 67029990 is 9992076.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192997 + ... + 193343.

It is an arithmetic number, because the mean of its divisors is an integer number (2593296).

Almost surely, 2^67029990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67029990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82985472).

67029990 is an abundant number, since it is smaller than the sum of its proper divisors (98940954).

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

67029990 is a wasteful number, since it uses less digits than its factorization.

67029990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 67029990 is about 8187.1844977379. The cubic root of 67029990 is about 406.2154009193.

The spelling of 67029990 in words is "sixty-seven million, twenty-nine thousand, nine hundred ninety".