123723930 has 64 divisors (see below), whose sum is σ = 332719488. Its totient is φ = 29180160.

The previous prime is 123723917. The next prime is 123723931. The reversal of 123723930 is 39327321.

It is a super-2 number, since 2×123723930² = 30615221709289800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123723931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7144 + ... + 17276.

It is an arithmetic number, because the mean of its divisors is an integer number (5198742).

Almost surely, 2^123723930 is an apocalyptic number.

123723930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123723930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166359744).

123723930 is an abundant number, since it is smaller than the sum of its proper divisors (208995558).

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

123723930 is a wasteful number, since it uses less digits than its factorization.

123723930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10191.

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 123723930 is about 11123.1259095634. The cubic root of 123723930 is about 498.2927505669.

The spelling of 123723930 in words is "one hundred twenty-three million, seven hundred twenty-three thousand, nine hundred thirty".