67421430 has 64 divisors (see below), whose sum is σ = 182522880. Its totient is φ = 17705952.

The previous prime is 67421429. The next prime is 67421461. The reversal of 67421430 is 3412476.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 67421394 and 67421403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16227 + ... + 19953.

It is an arithmetic number, because the mean of its divisors is an integer number (2851920).

Almost surely, 2^67421430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67421430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91261440).

67421430 is an abundant number, since it is smaller than the sum of its proper divisors (115101450).

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

67421430 is a wasteful number, since it uses less digits than its factorization.

67421430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3810 (or 3804 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 67421430 is about 8211.0553523892. The cubic root of 67421430 is about 407.0046020484.

The spelling of 67421430 in words is "sixty-seven million, four hundred twenty-one thousand, four hundred thirty".