123890301990 has 576 divisors, whose sum is σ = 427915051200. Its totient is φ = 24726933504.

The previous prime is 123890301989. The next prime is 123890302007. The reversal of 123890301990 is 99103098321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 184086294 + ... + 184086966.

It is an arithmetic number, because the mean of its divisors is an integer number (742908075).

Almost surely, 2^123890301990 is an apocalyptic number.

123890301990 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 123890301990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213957525600).

123890301990 is an abundant number, since it is smaller than the sum of its proper divisors (304024749210).

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

123890301990 is a wasteful number, since it uses less digits than its factorization.

123890301990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The spelling of 123890301990 in words is "one hundred twenty-three billion, eight hundred ninety million, three hundred one thousand, nine hundred ninety".