70136385 has 32 divisors (see below), whose sum is σ = 123420672. Its totient is φ = 33727680.

The previous prime is 70136369. The next prime is 70136389. The reversal of 70136385 is 58363107.

It is a happy number.

It is not a de Polignac number, because 70136385 - 2⁴ = 70136369 is a prime.

It is a super-2 number, since 2×70136385² = 9838225001736450, which contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (70136389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19282 + ... + 22628.

It is an arithmetic number, because the mean of its divisors is an integer number (3856896).

Almost surely, 2^70136385 is an apocalyptic number.

It is an amenable number.

70136385 is a deficient number, since it is larger than the sum of its proper divisors (53284287).

70136385 is a wasteful number, since it uses less digits than its factorization.

70136385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3493.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 70136385 is about 8374.7468618460. The cubic root of 70136385 is about 412.3960141928.

The spelling of 70136385 in words is "seventy million, one hundred thirty-six thousand, three hundred eighty-five".