67432820 has 144 divisors (see below), whose sum is σ = 182327040. Its totient is φ = 20756736.

The previous prime is 67432793. The next prime is 67432831. The reversal of 67432820 is 2823476.

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 47 ways as a sum of consecutive naturals, for example, 853541 + ... + 853619.

It is an arithmetic number, because the mean of its divisors is an integer number (1266160).

Almost surely, 2^67432820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67432820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91163520).

67432820 is an abundant number, since it is smaller than the sum of its proper divisors (114894220).

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

67432820 is a wasteful number, since it uses less digits than its factorization.

67432820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 67432820 is about 8211.7489002039. The cubic root of 67432820 is about 407.0275201888.

The spelling of 67432820 in words is "sixty-seven million, four hundred thirty-two thousand, eight hundred twenty".