67978830 has 32 divisors (see below), whose sum is σ = 164073600. Its totient is φ = 18024992.

The previous prime is 67978819. The next prime is 67978837. The reversal of 67978830 is 3887976.

It is a super-2 number, since 2×67978830² = 9242242656337800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67978830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67978837) by changing a digit.

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, 960 + ... + 11699.

It is an arithmetic number, because the mean of its divisors is an integer number (5127300).

Almost surely, 2^67978830 is an apocalyptic number.

67978830 is an abundant number, since it is smaller than the sum of its proper divisors (96094770).

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

67978830 is a wasteful number, since it uses less digits than its factorization.

67978830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12848.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 67978830 is about 8244.9275315190. The cubic root of 67978830 is about 408.1231486196.

The spelling of 67978830 in words is "sixty-seven million, nine hundred seventy-eight thousand, eight hundred thirty".