123740928 has 108 divisors (see below), whose sum is σ = 365365000. Its totient is φ = 40255488.

The previous prime is 123740927. The next prime is 123740957. The reversal of 123740928 is 829047321.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 123740892 and 123740901.

It is not an unprimeable number, because it can be changed into a prime (123740923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98448 + ... + 99696.

Almost surely, 2^123740928 is an apocalyptic number.

123740928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123740928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182682500).

123740928 is an abundant number, since it is smaller than the sum of its proper divisors (241624072).

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

123740928 is a wasteful number, since it uses less digits than its factorization.

123740928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314 (or 1297 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 123740928 is about 11123.8899670933. The cubic root of 123740928 is about 498.3155690907.

The spelling of 123740928 in words is "one hundred twenty-three million, seven hundred forty thousand, nine hundred twenty-eight".