70381806 has 32 divisors (see below), whose sum is σ = 154096128. Its totient is φ = 21253440.

The previous prime is 70381777. The next prime is 70381813. The reversal of 70381806 is 60818307.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18955 + ... + 22361.

It is an arithmetic number, because the mean of its divisors is an integer number (4815504).

Almost surely, 2^70381806 is an apocalyptic number.

70381806 is an abundant number, since it is smaller than the sum of its proper divisors (83714322).

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

70381806 is a wasteful number, since it uses less digits than its factorization.

With its successor (70381807) it forms an eRAP, since the sums of their prime factors are consecutive (3736 and 3737).

70381806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3736.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 70381806 is about 8389.3865091555. The cubic root of 70381806 is about 412.8764724655.

The spelling of 70381806 in words is "seventy million, three hundred eighty-one thousand, eight hundred six".