123078690 has 160 divisors (see below), whose sum is σ = 386812800. Its totient is φ = 28068768.

The previous prime is 123078677. The next prime is 123078731. The reversal of 123078690 is 96870321.

It is a super-2 number, since 2×123078690² = 30296727864232200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 277609 + ... + 278051.

It is an arithmetic number, because the mean of its divisors is an integer number (2417580).

Almost surely, 2^123078690 is an apocalyptic number.

123078690 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 123078690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193406400).

123078690 is an abundant number, since it is smaller than the sum of its proper divisors (263734110).

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

123078690 is an equidigital number, since it uses as much as digits as its factorization.

123078690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 123078690 is about 11094.0835583657. The cubic root of 123078690 is about 497.4250150026.

The spelling of 123078690 in words is "one hundred twenty-three million, seventy-eight thousand, six hundred ninety".