70947872 has 18 divisors (see below), whose sum is σ = 139772493. Its totient is φ = 35450112.

The previous prime is 70947859. The next prime is 70947883. The reversal of 70947872 is 27874907.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 64577296 + 6370576 = 8036^2 + 2524^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5956.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 46904 + ... + 48392.

Almost surely, 2^70947872 is an apocalyptic number.

It is an amenable number.

70947872 is a deficient number, since it is larger than the sum of its proper divisors (68824621).

70947872 is an frugal number, since it uses more digits than its factorization.

70947872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2988 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 70947872 is about 8423.0559774942. The cubic root of 70947872 is about 413.9804109069.

The spelling of 70947872 in words is "seventy million, nine hundred forty-seven thousand, eight hundred seventy-two".