861148438 has 8 divisors (see below), whose sum is σ = 1359708120. Its totient is φ = 407912400.

The previous prime is 861148433. The next prime is 861148439. The reversal of 861148438 is 834841168.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 861148394 and 861148403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861148433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11330863 + ... + 11330938.

It is an arithmetic number, because the mean of its divisors is an integer number (169963515).

Almost surely, 2^861148438 is an apocalyptic number.

861148438 is a deficient number, since it is larger than the sum of its proper divisors (498559682).

861148438 is a wasteful number, since it uses less digits than its factorization.

861148438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22661822.

The product of its digits is 147456, while the sum is 43.

The square root of 861148438 is about 29345.3307699879. The cubic root of 861148438 is about 951.3916586042.

The spelling of 861148438 in words is "eight hundred sixty-one million, one hundred forty-eight thousand, four hundred thirty-eight".