68528280 has 32 divisors (see below), whose sum is σ = 205585200. Its totient is φ = 18274176.

The previous prime is 68528263. The next prime is 68528333. The reversal of 68528280 is 8282586.

It is a super-2 number, since 2×68528280² = 9392250319516800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285415 + ... + 285654.

Almost surely, 2^68528280 is an apocalyptic number.

68528280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68528280 is an abundant number, since it is smaller than the sum of its proper divisors (137056920).

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

68528280 is a wasteful number, since it uses less digits than its factorization.

68528280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571083 (or 571079 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 68528280 is about 8278.1809596070. The cubic root of 68528280 is about 409.2197733651.

The spelling of 68528280 in words is "sixty-eight million, five hundred twenty-eight thousand, two hundred eighty".