123274890 has 96 divisors (see below), whose sum is σ = 331209216. Its totient is φ = 31795200.

The previous prime is 123274889. The next prime is 123274897. The reversal of 123274890 is 98472321.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123274897) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 638634 + ... + 638826.

It is an arithmetic number, because the mean of its divisors is an integer number (3450096).

Almost surely, 2^123274890 is an apocalyptic number.

123274890 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 123274890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165604608).

123274890 is an abundant number, since it is smaller than the sum of its proper divisors (207934326).

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

123274890 is a wasteful number, since it uses less digits than its factorization.

123274890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 401 counting only the distinct ones).

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

The square root of 123274890 is about 11102.9225882197. The cubic root of 123274890 is about 497.6891901010.

The spelling of 123274890 in words is "one hundred twenty-three million, two hundred seventy-four thousand, eight hundred ninety".