70280865 has 40 divisors (see below), whose sum is σ = 127354920. Its totient is φ = 37075968.

The previous prime is 70280857. The next prime is 70280879. The reversal of 70280865 is 56808207.

It can be written as a sum of positive squares in 4 ways, for example, as 20493729 + 49787136 = 4527^2 + 7056^2 .

It is not a de Polignac number, because 70280865 - 2³ = 70280857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 38391 + ... + 40179.

It is an arithmetic number, because the mean of its divisors is an integer number (3183873).

Almost surely, 2^70280865 is an apocalyptic number.

It is an amenable number.

70280865 is a deficient number, since it is larger than the sum of its proper divisors (57074055).

70280865 is a wasteful number, since it uses less digits than its factorization.

70280865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903 (or 1894 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 70280865 is about 8383.3683564543. The cubic root of 70280865 is about 412.6789966966.

The spelling of 70280865 in words is "seventy million, two hundred eighty thousand, eight hundred sixty-five".