70386881 has 4 divisors (see below), whose sum is σ = 70425264. Its totient is φ = 70348500.

The previous prime is 70386853. The next prime is 70386929. The reversal of 70386881 is 18868307.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 70386881 - 2¹⁰ = 70385857 is a prime.

It is a super-2 number, since 2×70386881² = 9908626033816322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70386821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16295 + ... + 20156.

It is an arithmetic number, because the mean of its divisors is an integer number (17606316).

Almost surely, 2^70386881 is an apocalyptic number.

It is an amenable number.

70386881 is a deficient number, since it is larger than the sum of its proper divisors (38383).

70386881 is a wasteful number, since it uses less digits than its factorization.

70386881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38382.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 70386881 is about 8389.6889692050. The cubic root of 70386881 is about 412.8863959474.

The spelling of 70386881 in words is "seventy million, three hundred eighty-six thousand, eight hundred eighty-one".