70028730 has 24 divisors (see below), whose sum is σ = 182074932. Its totient is φ = 18674304.

The previous prime is 70028723. The next prime is 70028771. The reversal of 70028730 is 3782007.

It can be written as a sum of positive squares in 2 ways, for example, as 64979721 + 5049009 = 8061^2 + 2247^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 70028694 and 70028703.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 388959 + ... + 389138.

Almost surely, 2^70028730 is an apocalyptic number.

70028730 is an abundant number, since it is smaller than the sum of its proper divisors (112046202).

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

70028730 is a wasteful number, since it uses less digits than its factorization.

70028730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778110 (or 778107 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 70028730 is about 8368.3170351033. The cubic root of 70028730 is about 412.1849053768.

The spelling of 70028730 in words is "seventy million, twenty-eight thousand, seven hundred thirty".