67891956 has 24 divisors (see below), whose sum is σ = 172816224. Its totient is φ = 20573280.

The previous prime is 67891951. The next prime is 67891961. The reversal of 67891956 is 65919876.

It is an interprime number because it is at equal distance from previous prime (67891951) and next prime (67891961).

It is a junction number, because it is equal to n+sod(n) for n = 67891899 and 67891908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67891951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257035 + ... + 257298.

It is an arithmetic number, because the mean of its divisors is an integer number (7200676).

Almost surely, 2^67891956 is an apocalyptic number.

67891956 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

67891956 is an abundant number, since it is smaller than the sum of its proper divisors (104924268).

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

67891956 is a wasteful number, since it uses less digits than its factorization.

67891956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514351 (or 514349 counting only the distinct ones).

The product of its digits is 816480, while the sum is 51.

The square root of 67891956 is about 8239.6575171545. The cubic root of 67891956 is about 407.9492199393.

The spelling of 67891956 in words is "sixty-seven million, eight hundred ninety-one thousand, nine hundred fifty-six".