70838 has 4 divisors (see below), whose sum is σ = 106260. Its totient is φ = 35418.

The previous prime is 70823. The next prime is 70841. The reversal of 70838 is 83807.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83807 = 43 ⋅1949.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

70838 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17708 + ... + 17711.

It is an arithmetic number, because the mean of its divisors is an integer number (26565).

2⁷⁰⁸³⁸ is an apocalyptic number.

70838 is a deficient number, since it is larger than the sum of its proper divisors (35422).

70838 is a wasteful number, since it uses less digits than its factorization.

70838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35421.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 70838 is about 266.1540907069. The cubic root of 70838 is about 41.3766599675.

The spelling of 70838 in words is "seventy thousand, eight hundred thirty-eight".