70506228 has 48 divisors (see below), whose sum is σ = 178516800. Its totient is φ = 21529344.

The previous prime is 70506199. The next prime is 70506229. The reversal of 70506228 is 82260507.

It is a super-2 number, since 2×70506228² = 9942256373575968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70506195 and 70506204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70506229) 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, 19723 + ... + 23021.

It is an arithmetic number, because the mean of its divisors is an integer number (3719100).

Almost surely, 2^70506228 is an apocalyptic number.

70506228 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70506228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89258400).

70506228 is an abundant number, since it is smaller than the sum of its proper divisors (108010572).

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

70506228 is a wasteful number, since it uses less digits than its factorization.

70506228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456 (or 3454 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 70506228 is about 8396.7986756859. The cubic root of 70506228 is about 413.1196256214.

The spelling of 70506228 in words is "seventy million, five hundred six thousand, two hundred twenty-eight".