861838948 has 6 divisors (see below), whose sum is σ = 1508218166. Its totient is φ = 430919472.

The previous prime is 861838937. The next prime is 861838973. The reversal of 861838948 is 849838168.

It can be written as a sum of positive squares in only one way, i.e., 844599844 + 17239104 = 29062^2 + 4152^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107729865 + ... + 107729872.

Almost surely, 2^861838948 is an apocalyptic number.

It is an amenable number.

861838948 is a deficient number, since it is larger than the sum of its proper divisors (646379218).

861838948 is a wasteful number, since it uses less digits than its factorization.

861838948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215459741 (or 215459739 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 55.

The square root of 861838948 is about 29357.0936572407. The cubic root of 861838948 is about 951.6458811103.

The spelling of 861838948 in words is "eight hundred sixty-one million, eight hundred thirty-eight thousand, nine hundred forty-eight".