268489780 has 48 divisors (see below), whose sum is σ = 608509440. Its totient is φ = 98921088.

The previous prime is 268489777. The next prime is 268489783. The reversal of 268489780 is 87984862.

It is an interprime number because it is at equal distance from previous prime (268489777) and next prime (268489783).

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268489783) 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, 170557 + ... + 172123.

It is an arithmetic number, because the mean of its divisors is an integer number (12677280).

Almost surely, 2^268489780 is an apocalyptic number.

268489780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

268489780 is an abundant number, since it is smaller than the sum of its proper divisors (340019660).

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

268489780 is a wasteful number, since it uses less digits than its factorization.

268489780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248 (or 2246 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 52.

The square root of 268489780 is about 16385.6577530473. The cubic root of 268489780 is about 645.1230901033.

The spelling of 268489780 in words is "two hundred sixty-eight million, four hundred eighty-nine thousand, seven hundred eighty".