67243990 has 32 divisors (see below), whose sum is σ = 132412320. Its totient is φ = 24384000.

The previous prime is 67243987. The next prime is 67243997. The reversal of 67243990 is 9934276.

It is a super-2 number, since 2×67243990² = 9043508382240200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67243997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55390 + ... + 56590.

It is an arithmetic number, because the mean of its divisors is an integer number (4137885).

Almost surely, 2^67243990 is an apocalyptic number.

67243990 is a deficient number, since it is larger than the sum of its proper divisors (65168330).

67243990 is a wasteful number, since it uses less digits than its factorization.

67243990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 67243990 is about 8200.2432890738. The cubic root of 67243990 is about 406.6472362241.

The spelling of 67243990 in words is "sixty-seven million, two hundred forty-three thousand, nine hundred ninety".