67643748 has 60 divisors (see below), whose sum is σ = 187251372. Its totient is φ = 21219840.

The previous prime is 67643729. The next prime is 67643749. The reversal of 67643748 is 84734676.

It can be written as a sum of positive squares in 2 ways, for example, as 56070144 + 11573604 = 7488^2 + 3402^2 .

It is not an unprimeable number, because it can be changed into a prime (67643749) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 633 + ... + 11648.

Almost surely, 2^67643748 is an apocalyptic number.

67643748 is a gapful number since it is divisible by the number (68) 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 67643748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93625686).

67643748 is an abundant number, since it is smaller than the sum of its proper divisors (119607624).

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

67643748 is a wasteful number, since it uses less digits than its factorization.

67643748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12314 (or 12303 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 67643748 is about 8224.5819346639. The cubic root of 67643748 is about 407.4514687458.

The spelling of 67643748 in words is "sixty-seven million, six hundred forty-three thousand, seven hundred forty-eight".