67240290 has 32 divisors (see below), whose sum is σ = 173791296. Its totient is φ = 16551360.

The previous prime is 67240279. The next prime is 67240291. The reversal of 67240290 is 9204276.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67240291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85816 + ... + 86595.

It is an arithmetic number, because the mean of its divisors is an integer number (5430978).

Almost surely, 2^67240290 is an apocalyptic number.

67240290 is an abundant number, since it is smaller than the sum of its proper divisors (106551006).

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

67240290 is a wasteful number, since it uses less digits than its factorization.

67240290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172434.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 67240290 is about 8200.0176829078. The cubic root of 67240290 is about 406.6397777020.

The spelling of 67240290 in words is "sixty-seven million, two hundred forty thousand, two hundred ninety".