67990320 has 80 divisors (see below), whose sum is σ = 234196320. Its totient is φ = 18130176.

The previous prime is 67990313. The next prime is 67990331. The reversal of 67990320 is 2309976.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×67990320² = 9245367227404800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 15 ways as a sum of consecutive naturals, for example, 13579 + ... + 17898.

It is an arithmetic number, because the mean of its divisors is an integer number (2927454).

Almost surely, 2^67990320 is an apocalyptic number.

67990320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67990320 is an abundant number, since it is smaller than the sum of its proper divisors (166206000).

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

67990320 is a wasteful number, since it uses less digits than its factorization.

67990320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31499 (or 31487 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 67990320 is about 8245.6242941332. The cubic root of 67990320 is about 408.1461414190.

The spelling of 67990320 in words is "sixty-seven million, nine hundred ninety thousand, three hundred twenty".