861248738 has 16 divisors (see below), whose sum is σ = 1476911040. Its totient is φ = 368985456.

The previous prime is 861248711. The next prime is 861248743. The reversal of 861248738 is 837842168.

It is a junction number, because it is equal to n+sod(n) for n = 861248692 and 861248701.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44120 + ... + 60572.

It is an arithmetic number, because the mean of its divisors is an integer number (92306940).

Almost surely, 2^861248738 is an apocalyptic number.

861248738 is a deficient number, since it is larger than the sum of its proper divisors (615662302).

861248738 is a wasteful number, since it uses less digits than its factorization.

861248738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20201.

The product of its digits is 516096, while the sum is 47.

The square root of 861248738 is about 29347.0396803494. The cubic root of 861248738 is about 951.4285941175.

The spelling of 861248738 in words is "eight hundred sixty-one million, two hundred forty-eight thousand, seven hundred thirty-eight".