67712436 has 84 divisors (see below), whose sum is σ = 193906944. Its totient is φ = 20509200.

The previous prime is 67712431. The next prime is 67712453. The reversal of 67712436 is 63421776.

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

It is a self number, because there is not a number n which added to its sum of digits gives 67712436.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67712431) 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 27 ways as a sum of consecutive naturals, for example, 31021 + ... + 33131.

It is an arithmetic number, because the mean of its divisors is an integer number (2308416).

Almost surely, 2^67712436 is an apocalyptic number.

67712436 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67712436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96953472).

67712436 is an abundant number, since it is smaller than the sum of its proper divisors (126194508).

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

67712436 is a wasteful number, since it uses less digits than its factorization.

67712436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144 (or 2127 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 67712436 is about 8228.7566497011. The cubic root of 67712436 is about 407.5893359281.

The spelling of 67712436 in words is "sixty-seven million, seven hundred twelve thousand, four hundred thirty-six".