123640884 has 24 divisors (see below), whose sum is σ = 320550720. Its totient is φ = 41213592.

The previous prime is 123640883. The next prime is 123640897. The reversal of 123640884 is 488046321.

123640884 is a `hidden beast` number, since 1 + 2 + 3 + 640 + 8 + 8 + 4 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123640883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 572304 + ... + 572519.

It is an arithmetic number, because the mean of its divisors is an integer number (13356280).

Almost surely, 2^123640884 is an apocalyptic number.

It is an amenable number.

123640884 is an abundant number, since it is smaller than the sum of its proper divisors (196909836).

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

123640884 is a wasteful number, since it uses less digits than its factorization.

123640884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144836 (or 1144828 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 123640884 is about 11119.3922495791. The cubic root of 123640884 is about 498.1812375614.

The spelling of 123640884 in words is "one hundred twenty-three million, six hundred forty thousand, eight hundred eighty-four".