67205640 has 32 divisors (see below), whose sum is σ = 201617280. Its totient is φ = 17921472.

The previous prime is 67205639. The next prime is 67205647. The reversal of 67205640 is 4650276.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 67205598 and 67205607.

It is not an unprimeable number, because it can be changed into a prime (67205647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279904 + ... + 280143.

It is an arithmetic number, because the mean of its divisors is an integer number (6300540).

Almost surely, 2^67205640 is an apocalyptic number.

67205640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67205640 is an abundant number, since it is smaller than the sum of its proper divisors (134411640).

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

67205640 is a wasteful number, since it uses less digits than its factorization.

67205640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560061 (or 560057 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 67205640 is about 8197.9046103257. The cubic root of 67205640 is about 406.5699163670.

The spelling of 67205640 in words is "sixty-seven million, two hundred five thousand, six hundred forty".