123235740 has 36 divisors (see below), whose sum is σ = 373815624. Its totient is φ = 32862816.

The previous prime is 123235667. The next prime is 123235741. The reversal of 123235740 is 47532321.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×123235740² = 30374095226695200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123235741) 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, 342142 + ... + 342501.

Almost surely, 2^123235740 is an apocalyptic number.

123235740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123235740 is an abundant number, since it is smaller than the sum of its proper divisors (250579884).

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

123235740 is a wasteful number, since it uses less digits than its factorization.

123235740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684658 (or 684653 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 123235740 is about 11101.1593989096. The cubic root of 123235740 is about 497.6364986600.

The spelling of 123235740 in words is "one hundred twenty-three million, two hundred thirty-five thousand, seven hundred forty".