70828281 has 12 divisors (see below), whose sum is σ = 103114752. Its totient is φ = 46846296.

The previous prime is 70828271. The next prime is 70828297. The reversal of 70828281 is 18282807.

It is not a de Polignac number, because 70828281 - 2⁶ = 70828217 is a prime.

It is a super-2 number, since 2×70828281² = 10033290778829922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (70828231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29841 + ... + 32126.

It is an arithmetic number, because the mean of its divisors is an integer number (8592896).

Almost surely, 2^70828281 is an apocalyptic number.

It is an amenable number.

70828281 is a deficient number, since it is larger than the sum of its proper divisors (32286471).

70828281 is a wasteful number, since it uses less digits than its factorization.

70828281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62100 (or 62097 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 70828281 is about 8415.9539566231. The cubic root of 70828281 is about 413.7476758327.

The spelling of 70828281 in words is "seventy million, eight hundred twenty-eight thousand, two hundred eighty-one".