268236690 has 32 divisors (see below), whose sum is σ = 644595840. Its totient is φ = 71437824.

The previous prime is 268236667. The next prime is 268236697. The reversal of 268236690 is 96632862.

It is a super-2 number, since 2×268236690² = 143901843724312200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (268236697) 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, 19842 + ... + 30498.

It is an arithmetic number, because the mean of its divisors is an integer number (20143620).

Almost surely, 2^268236690 is an apocalyptic number.

268236690 is an abundant number, since it is smaller than the sum of its proper divisors (376359150).

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

268236690 is a wasteful number, since it uses less digits than its factorization.

268236690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11506.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 268236690 is about 16377.9330197678. The cubic root of 268236690 is about 644.9203194641.

The spelling of 268236690 in words is "two hundred sixty-eight million, two hundred thirty-six thousand, six hundred ninety".