67881870 has 192 divisors, whose sum is σ = 218350080. Its totient is φ = 14287104.

The previous prime is 67881857. The next prime is 67881871. The reversal of 67881870 is 7818876.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67881871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 634357 + ... + 634463.

It is an arithmetic number, because the mean of its divisors is an integer number (1137240).

Almost surely, 2^67881870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67881870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109175040).

67881870 is an abundant number, since it is smaller than the sum of its proper divisors (150468210).

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

67881870 is a wasteful number, since it uses less digits than its factorization.

67881870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 67881870 is about 8239.0454544201. The cubic root of 67881870 is about 407.9290173515.

The spelling of 67881870 in words is "sixty-seven million, eight hundred eighty-one thousand, eight hundred seventy".