68528290 has 16 divisors (see below), whose sum is σ = 127330560. Its totient is φ = 26526960.

The previous prime is 68528263. The next prime is 68528333. The reversal of 68528290 is 9282586.

It is a super-2 number, since 2×68528290² = 9392253060648200, which contains 22 as substring.

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, 110220 + ... + 110839.

It is an arithmetic number, because the mean of its divisors is an integer number (7958160).

Almost surely, 2^68528290 is an apocalyptic number.

68528290 is a deficient number, since it is larger than the sum of its proper divisors (58802270).

68528290 is a wasteful number, since it uses less digits than its factorization.

68528290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221097.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 68528290 is about 8278.1815636044. The cubic root of 68528290 is about 409.2197932703.

The spelling of 68528290 in words is "sixty-eight million, five hundred twenty-eight thousand, two hundred ninety".