70931380 has 24 divisors (see below), whose sum is σ = 160414632. Its totient is φ = 26189952.

The previous prime is 70931369. The next prime is 70931383. The reversal of 70931380 is 8313907.

It can be written as a sum of positive squares in 4 ways, for example, as 10278436 + 60652944 = 3206^2 + 7788^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70931383) 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 7 ways as a sum of consecutive naturals, for example, 136147 + ... + 136666.

It is an arithmetic number, because the mean of its divisors is an integer number (6683943).

Almost surely, 2^70931380 is an apocalyptic number.

It is an amenable number.

70931380 is an abundant number, since it is smaller than the sum of its proper divisors (89483252).

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

70931380 is a wasteful number, since it uses less digits than its factorization.

70931380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272835 (or 272833 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 70931380 is about 8422.0769409926. The cubic root of 70931380 is about 413.9483315139.

The spelling of 70931380 in words is "seventy million, nine hundred thirty-one thousand, three hundred eighty".