961138244 has 12 divisors (see below), whose sum is σ = 1834900368. Its totient is φ = 436881000.

The previous prime is 961138219. The next prime is 961138247. The reversal of 961138244 is 442831169.

It is a junction number, because it is equal to n+sod(n) for n = 961138198 and 961138207.

It is not an unprimeable number, because it can be changed into a prime (961138247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10921982 + ... + 10922069.

It is an arithmetic number, because the mean of its divisors is an integer number (152908364).

Almost surely, 2^961138244 is an apocalyptic number.

It is an amenable number.

961138244 is a deficient number, since it is larger than the sum of its proper divisors (873762124).

961138244 is a wasteful number, since it uses less digits than its factorization.

961138244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21844066 (or 21844064 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 961138244 is about 31002.2296617517. The cubic root of 961138244 is about 986.8745578397.

The spelling of 961138244 in words is "nine hundred sixty-one million, one hundred thirty-eight thousand, two hundred forty-four".