123811944 has 64 divisors (see below), whose sum is σ = 328371840. Its totient is φ = 38818560.

The previous prime is 123811943. The next prime is 123811951. The reversal of 123811944 is 449118321.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (123811943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31834 + ... + 35510.

It is an arithmetic number, because the mean of its divisors is an integer number (5130810).

Almost surely, 2^123811944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123811944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164185920).

123811944 is an abundant number, since it is smaller than the sum of its proper divisors (204559896).

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

123811944 is a wasteful number, since it uses less digits than its factorization.

123811944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770 (or 3766 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 123811944 is about 11127.0815580726. The cubic root of 123811944 is about 498.4108800798.

The spelling of 123811944 in words is "one hundred twenty-three million, eight hundred eleven thousand, nine hundred forty-four".