123802840 has 128 divisors (see below), whose sum is σ = 348364800. Its totient is φ = 38615040.

The previous prime is 123802793. The next prime is 123802853. The reversal of 123802840 is 48208321.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 123802799 and 123802808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147141 + ... + 147979.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^123802840 is an apocalyptic number.

123802840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123802840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174182400).

123802840 is an abundant number, since it is smaller than the sum of its proper divisors (224561960).

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

123802840 is a wasteful number, since it uses less digits than its factorization.

123802840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 123802840 is about 11126.6724585565. The cubic root of 123802840 is about 498.3986635851.

The spelling of 123802840 in words is "one hundred twenty-three million, eight hundred two thousand, eight hundred forty".