870066838 has 4 divisors (see below), whose sum is σ = 1305100260. Its totient is φ = 435033418.

The previous prime is 870066767. The next prime is 870066871. The reversal of 870066838 is 838660078.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 838660078 = 2 ⋅419330039.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217516708 + ... + 217516711.

It is an arithmetic number, because the mean of its divisors is an integer number (326275065).

Almost surely, 2^870066838 is an apocalyptic number.

870066838 is a deficient number, since it is larger than the sum of its proper divisors (435033422).

870066838 is a wasteful number, since it uses less digits than its factorization.

870066838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435033421.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 870066838 is about 29496.8953959565. The cubic root of 870066838 is about 954.6647171477.

It can be divided in two parts, 8700668 and 38, that added together give a triangular number (8700706 = T₄₁₇₁).

The spelling of 870066838 in words is "eight hundred seventy million, sixty-six thousand, eight hundred thirty-eight".