67249638 has 48 divisors (see below), whose sum is σ = 149509152. Its totient is φ = 21840000.

The previous prime is 67249613. The next prime is 67249639. The reversal of 67249638 is 83694276.

67249638 is a `hidden beast` number, since 6 + 7 + 2 + 4 + 9 + 638 = 666.

It is a super-2 number, since 2×67249638² = 9045027622262088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 67249593 and 67249602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67249639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128818 + ... + 129338.

It is an arithmetic number, because the mean of its divisors is an integer number (3114774).

Almost surely, 2^67249638 is an apocalyptic number.

67249638 is an abundant number, since it is smaller than the sum of its proper divisors (82259514).

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

67249638 is a wasteful number, since it uses less digits than its factorization.

67249638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 698 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 67249638 is about 8200.5876618691. The cubic root of 67249638 is about 406.6586210299.

The spelling of 67249638 in words is "sixty-seven million, two hundred forty-nine thousand, six hundred thirty-eight".