123387885 has 24 divisors (see below), whose sum is σ = 216807864. Its totient is φ = 64903680.

The previous prime is 123387877. The next prime is 123387889. The reversal of 123387885 is 588783321.

It can be written as a sum of positive squares in 4 ways, for example, as 1572516 + 121815369 = 1254^2 + 11037^2 .

It is not a de Polignac number, because 123387885 - 2³ = 123387877 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 123387885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123387889) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15496 + ... + 22065.

It is an arithmetic number, because the mean of its divisors is an integer number (9033661).

Almost surely, 2^123387885 is an apocalyptic number.

123387885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123387885 is a deficient number, since it is larger than the sum of its proper divisors (93419979).

123387885 is a wasteful number, since it uses less digits than its factorization.

123387885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37645 (or 37642 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 123387885 is about 11108.0099477809. The cubic root of 123387885 is about 497.8412059644.

The spelling of 123387885 in words is "one hundred twenty-three million, three hundred eighty-seven thousand, eight hundred eighty-five".