67438257 has 8 divisors (see below), whose sum is σ = 90153984. Its totient is φ = 44840688.

The previous prime is 67438249. The next prime is 67438291. The reversal of 67438257 is 75283476.

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

It is not a de Polignac number, because 67438257 - 2³ = 67438249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67438157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28198 + ... + 30495.

It is an arithmetic number, because the mean of its divisors is an integer number (11269248).

Almost surely, 2^67438257 is an apocalyptic number.

It is an amenable number.

67438257 is a deficient number, since it is larger than the sum of its proper divisors (22715727).

67438257 is a wasteful number, since it uses less digits than its factorization.

67438257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59079.

The product of its digits is 282240, while the sum is 42.

The square root of 67438257 is about 8212.0799435953. The cubic root of 67438257 is about 407.0384592199.

The spelling of 67438257 in words is "sixty-seven million, four hundred thirty-eight thousand, two hundred fifty-seven".