67428287 has 8 divisors (see below), whose sum is σ = 68565504. Its totient is φ = 66298968.

The previous prime is 67428281. The next prime is 67428367. The reversal of 67428287 is 78282476.

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

It is a cyclic number.

It is not a de Polignac number, because 67428287 - 2⁴ = 67428271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67428281) 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, 16688 + ... + 20330.

It is an arithmetic number, because the mean of its divisors is an integer number (8570688).

Almost surely, 2^67428287 is an apocalyptic number.

67428287 is a deficient number, since it is larger than the sum of its proper divisors (1137217).

67428287 is a wasteful number, since it uses less digits than its factorization.

67428287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949.

The product of its digits is 301056, while the sum is 44.

The square root of 67428287 is about 8211.4728885870. The cubic root of 67428287 is about 407.0183995207.

The spelling of 67428287 in words is "sixty-seven million, four hundred twenty-eight thousand, two hundred eighty-seven".