123740892 has 144 divisors (see below), whose sum is σ = 374038560. Its totient is φ = 35228160.

The previous prime is 123740873. The next prime is 123740923. The reversal of 123740892 is 298047321.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221878 + ... + 222434.

It is an arithmetic number, because the mean of its divisors is an integer number (2597490).

Almost surely, 2^123740892 is an apocalyptic number.

123740892 is a gapful number since it is divisible by the number (12) 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 123740892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187019280).

123740892 is an abundant number, since it is smaller than the sum of its proper divisors (250297668).

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

123740892 is a wasteful number, since it uses less digits than its factorization.

123740892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609 (or 590 counting only the distinct ones).

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

The square root of 123740892 is about 11123.8883489542. Note that the first 3 decimals coincide. The cubic root of 123740892 is about 498.3155207656.

The spelling of 123740892 in words is "one hundred twenty-three million, seven hundred forty thousand, eight hundred ninety-two".