67438730 has 8 divisors (see below), whose sum is σ = 121389732. Its totient is φ = 26975488.

The previous prime is 67438699. The next prime is 67438747. The reversal of 67438730 is 3783476.

It can be written as a sum of positive squares in 2 ways, for example, as 67256401 + 182329 = 8201^2 + 427^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3371927 + ... + 3371946.

Almost surely, 2^67438730 is an apocalyptic number.

67438730 is a deficient number, since it is larger than the sum of its proper divisors (53951002).

67438730 is a wasteful number, since it uses less digits than its factorization.

67438730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6743880.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 67438730 is about 8212.1087425825. The cubic root of 67438730 is about 407.0394108496.

The spelling of 67438730 in words is "sixty-seven million, four hundred thirty-eight thousand, seven hundred thirty".