123818340 has 48 divisors (see below), whose sum is σ = 357880320. Its totient is φ = 31952640.

The previous prime is 123818291. The next prime is 123818341. The reversal of 123818340 is 43818321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 123818298 and 123818307.

It is not an unprimeable number, because it can be changed into a prime (123818341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31425 + ... + 35144.

It is an arithmetic number, because the mean of its divisors is an integer number (7455840).

Almost surely, 2^123818340 is an apocalyptic number.

123818340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123818340 is an abundant number, since it is smaller than the sum of its proper divisors (234061980).

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

123818340 is a wasteful number, since it uses less digits than its factorization.

123818340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66612 (or 66610 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 123818340 is about 11127.3689612594. The cubic root of 123818340 is about 498.4194623996.

The spelling of 123818340 in words is "one hundred twenty-three million, eight hundred eighteen thousand, three hundred forty".