123793890 has 96 divisors (see below), whose sum is σ = 332095680. Its totient is φ = 29504640.

The previous prime is 123793841. The next prime is 123793903. The reversal of 123793890 is 98397321.

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, 242956 + ... + 243464.

It is an arithmetic number, because the mean of its divisors is an integer number (3459330).

Almost surely, 2^123793890 is an apocalyptic number.

123793890 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 123793890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166047840).

123793890 is an abundant number, since it is smaller than the sum of its proper divisors (208301790).

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

123793890 is a wasteful number, since it uses less digits than its factorization.

123793890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 123793890 is about 11126.2702645586. The cubic root of 123793890 is about 498.3866531564.

The spelling of 123793890 in words is "one hundred twenty-three million, seven hundred ninety-three thousand, eight hundred ninety".