67639012 has 72 divisors (see below), whose sum is σ = 148811040. Its totient is φ = 26732160.

The previous prime is 67639009. The next prime is 67639027. The reversal of 67639012 is 21093676.

It is a super-2 number, since 2×67639012² = 9150071888672288, which contains 22 as substring.

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, 152463 + ... + 152905.

It is an arithmetic number, because the mean of its divisors is an integer number (2066820).

Almost surely, 2^67639012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67639012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74405520).

67639012 is an abundant number, since it is smaller than the sum of its proper divisors (81172028).

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

67639012 is a wasteful number, since it uses less digits than its factorization.

67639012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 67639012 is about 8224.2940122542. The cubic root of 67639012 is about 407.4419594404.

The spelling of 67639012 in words is "sixty-seven million, six hundred thirty-nine thousand, twelve".