70811028 has 18 divisors (see below), whose sum is σ = 178994634. Its totient is φ = 23603664.

The previous prime is 70811023. The next prime is 70811047. The reversal of 70811028 is 82011807.

It can be written as a sum of positive squares in only one way, i.e., 70761744 + 49284 = 8412^2 + 222^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 70810992 and 70811010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70811023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 983451 + ... + 983522.

Almost surely, 2^70811028 is an apocalyptic number.

It is an amenable number.

70811028 is an abundant number, since it is smaller than the sum of its proper divisors (108183606).

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

70811028 is a wasteful number, since it uses less digits than its factorization.

70811028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966983 (or 1966978 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 70811028 is about 8414.9288767048. The cubic root of 70811028 is about 413.7140782911.

The spelling of 70811028 in words is "seventy million, eight hundred eleven thousand, twenty-eight".