123345890 has 16 divisors (see below), whose sum is σ = 223188480. Its totient is φ = 49079280.

The previous prime is 123345883. The next prime is 123345913. The reversal of 123345890 is 98543321.

It is a self number, because there is not a number n which added to its sum of digits gives 123345890.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30380 + ... + 34199.

It is an arithmetic number, because the mean of its divisors is an integer number (13949280).

Almost surely, 2^123345890 is an apocalyptic number.

123345890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123345890 is a deficient number, since it is larger than the sum of its proper divisors (99842590).

123345890 is a wasteful number, since it uses less digits than its factorization.

123345890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64777.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 123345890 is about 11106.1194843203. The cubic root of 123345890 is about 497.7847195604.

The spelling of 123345890 in words is "one hundred twenty-three million, three hundred forty-five thousand, eight hundred ninety".