67388140 has 24 divisors (see below), whose sum is σ = 141733872. Its totient is φ = 26913600.

The previous prime is 67388093. The next prime is 67388161. The reversal of 67388140 is 4188376.

It is a happy number.

It is a super-2 number, since 2×67388140² = 9082322825319200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67388140.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12915 + ... + 17365.

It is an arithmetic number, because the mean of its divisors is an integer number (5905578).

Almost surely, 2^67388140 is an apocalyptic number.

It is an amenable number.

67388140 is an abundant number, since it is smaller than the sum of its proper divisors (74345732).

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

67388140 is a wasteful number, since it uses less digits than its factorization.

67388140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5217 (or 5215 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 67388140 is about 8209.0279570726. The cubic root of 67388140 is about 406.9376035000.

It can be divided in two parts, 67388 and 140, that added together give a triangular number (67528 = T₃₆₇).

The spelling of 67388140 in words is "sixty-seven million, three hundred eighty-eight thousand, one hundred forty".