961920838 has 4 divisors (see below), whose sum is σ = 1442881260. Its totient is φ = 480960418.

The previous prime is 961920829. The next prime is 961920853. The reversal of 961920838 is 838029169.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240480208 + ... + 240480211.

It is an arithmetic number, because the mean of its divisors is an integer number (360720315).

Almost surely, 2^961920838 is an apocalyptic number.

961920838 is a deficient number, since it is larger than the sum of its proper divisors (480960422).

961920838 is a wasteful number, since it uses less digits than its factorization.

961920838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480960421.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 961920838 is about 31014.8486696292. The cubic root of 961920838 is about 987.1423349917.

The spelling of 961920838 in words is "nine hundred sixty-one million, nine hundred twenty thousand, eight hundred thirty-eight".