70828069 has 24 divisors (see below), whose sum is σ = 82415880. Its totient is φ = 60622848.

The previous prime is 70828049. The next prime is 70828111. The reversal of 70828069 is 96082807.

It can be written as a sum of positive squares in 12 ways, for example, as 48860100 + 21967969 = 6990^2 + 4687^2 .

It is not a de Polignac number, because 70828069 - 2²¹ = 68730917 is a prime.

It is a super-2 number, since 2×70828069² = 10033230716537522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70828019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 255559 + ... + 255835.

It is an arithmetic number, because the mean of its divisors is an integer number (3433995).

Almost surely, 2^70828069 is an apocalyptic number.

It is an amenable number.

70828069 is a deficient number, since it is larger than the sum of its proper divisors (11587811).

70828069 is a wasteful number, since it uses less digits than its factorization.

70828069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 70828069 is about 8415.9413614877. The cubic root of 70828069 is about 413.7472630287.

It can be divided in two parts, 7082 and 8069, that added together give a palindrome (15151).

The spelling of 70828069 in words is "seventy million, eight hundred twenty-eight thousand, sixty-nine".