67684290 has 32 divisors (see below), whose sum is σ = 162993600. Its totient is φ = 17987904.

The previous prime is 67684247. The next prime is 67684297. The reversal of 67684290 is 9248676.

It is a super-2 number, since 2×67684290² = 9162326225608200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67684297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5536 + ... + 12884.

It is an arithmetic number, because the mean of its divisors is an integer number (5093550).

Almost surely, 2^67684290 is an apocalyptic number.

67684290 is an abundant number, since it is smaller than the sum of its proper divisors (95309310).

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

67684290 is a wasteful number, since it uses less digits than its factorization.

67684290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7666.

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

The square root of 67684290 is about 8227.0462500219. The cubic root of 67684290 is about 407.5328539384.

The spelling of 67684290 in words is "sixty-seven million, six hundred eighty-four thousand, two hundred ninety".