798844138 has 4 divisors (see below), whose sum is σ = 1198266210. Its totient is φ = 399422068.

The previous prime is 798844133. The next prime is 798844147. The reversal of 798844138 is 831448897.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 594725769 + 204118369 = 24387^2 + 14287^2 .

It is not an unprimeable number, because it can be changed into a prime (798844133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199711033 + ... + 199711036.

Almost surely, 2^798844138 is an apocalyptic number.

798844138 is a deficient number, since it is larger than the sum of its proper divisors (399422072).

798844138 is a wasteful number, since it uses less digits than its factorization.

798844138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399422071.

The product of its digits is 1548288, while the sum is 52.

The square root of 798844138 is about 28263.8309151467. The cubic root of 798844138 is about 927.8704648826.

The spelling of 798844138 in words is "seven hundred ninety-eight million, eight hundred forty-four thousand, one hundred thirty-eight".