67818240 has 324 divisors, whose sum is σ = 277730544. Its totient is φ = 14966784.

The previous prime is 67818209. The next prime is 67818251. The reversal of 67818240 is 4281876.

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

It is a junction number, because it is equal to n+sod(n) for n = 67818195 and 67818204.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2338546 + ... + 2338574.

Almost surely, 2^67818240 is an apocalyptic number.

67818240 is a gapful number since it is divisible by the number (60) 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 67818240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138865272).

67818240 is an abundant number, since it is smaller than the sum of its proper divisors (209912304).

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

67818240 is a wasteful number, since it uses less digits than its factorization.

67818240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 67818240 is about 8235.1830580747. The cubic root of 67818240 is about 407.8015182228.

The spelling of 67818240 in words is "sixty-seven million, eight hundred eighteen thousand, two hundred forty".