70830405 has 12 divisors (see below), whose sum is σ = 122772780. Its totient is φ = 37776192.

The previous prime is 70830401. The next prime is 70830427. The reversal of 70830405 is 50403807.

It can be written as a sum of positive squares in 2 ways, for example, as 8767521 + 62062884 = 2961^2 + 7878^2 .

It is not a de Polignac number, because 70830405 - 2² = 70830401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70830401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 786960 + ... + 787049.

It is an arithmetic number, because the mean of its divisors is an integer number (10231065).

Almost surely, 2^70830405 is an apocalyptic number.

It is an amenable number.

70830405 is a deficient number, since it is larger than the sum of its proper divisors (51942375).

70830405 is a wasteful number, since it uses less digits than its factorization.

70830405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574020 (or 1574017 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 70830405 is about 8416.0801445804. The cubic root of 70830405 is about 413.7518116160.

It can be divided in two parts, 708 and 30405, that added together give a palindrome (31113).

The spelling of 70830405 in words is "seventy million, eight hundred thirty thousand, four hundred five".