70528289 has 8 divisors (see below), whose sum is σ = 76020672. Its totient is φ = 65045520.

The previous prime is 70528267. The next prime is 70528309. The reversal of 70528289 is 98282507.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70528289 - 2¹⁶ = 70462753 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70528229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22322 + ... + 25284.

It is an arithmetic number, because the mean of its divisors is an integer number (9502584).

Almost surely, 2^70528289 is an apocalyptic number.

It is an amenable number.

70528289 is a deficient number, since it is larger than the sum of its proper divisors (5492383).

70528289 is a wasteful number, since it uses less digits than its factorization.

70528289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4807.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 70528289 is about 8398.1122283523. The cubic root of 70528289 is about 413.1627087264.

The spelling of 70528289 in words is "seventy million, five hundred twenty-eight thousand, two hundred eighty-nine".