999961944 has 32 divisors (see below), whose sum is σ = 2631480000. Its totient is φ = 315777312.

The previous prime is 999961943. The next prime is 999961979. The reversal of 999961944 is 449169999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999961943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095994 + ... + 1096905.

It is an arithmetic number, because the mean of its divisors is an integer number (82233750).

Almost surely, 2^999961944 is an apocalyptic number.

It is an amenable number.

999961944 is an abundant number, since it is smaller than the sum of its proper divisors (1631518056).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999961944 is a wasteful number, since it uses less digits than its factorization.

999961944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2192927 (or 2192923 counting only the distinct ones).

The product of its digits is 5668704, while the sum is 60.

The square root of 999961944 is about 31622.1748777658. The cubic root of 999961944 is about 999.9873145057.

The spelling of 999961944 in words is "nine hundred ninety-nine million, nine hundred sixty-one thousand, nine hundred forty-four".