123612440 has 64 divisors (see below), whose sum is σ = 336571200. Its totient is φ = 39886848.

The previous prime is 123612421. The next prime is 123612509. The reversal of 123612440 is 44216321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8225 + ... + 17744.

It is an arithmetic number, because the mean of its divisors is an integer number (5258925).

Almost surely, 2^123612440 is an apocalyptic number.

123612440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123612440 is an abundant number, since it is smaller than the sum of its proper divisors (212958760).

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

123612440 is a wasteful number, since it uses less digits than its factorization.

123612440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26004 (or 26000 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 123612440 is about 11118.1131492713. The cubic root of 123612440 is about 498.1430318767.

Adding to 123612440 its reverse (44216321), we get a palindrome (167828761).

The spelling of 123612440 in words is "one hundred twenty-three million, six hundred twelve thousand, four hundred forty".