123417478440 has 128 divisors (see below), whose sum is σ = 433043856000. Its totient is φ = 31179147264.

The previous prime is 123417478433. The next prime is 123417478447. The reversal of 123417478440 is 44874714321.

123417478440 is a `hidden beast` number, since 1 + 2 + 34 + 174 + 7 + 8 + 440 = 666.

It is an interprime number because it is at equal distance from previous prime (123417478433) and next prime (123417478447).

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

It is not an unprimeable number, because it can be changed into a prime (123417478447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2986729 + ... + 3027768.

It is an arithmetic number, because the mean of its divisors is an integer number (3383155125).

Almost surely, 2^123417478440 is an apocalyptic number.

123417478440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123417478440 is an abundant number, since it is smaller than the sum of its proper divisors (309626377560).

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

123417478440 is a wasteful number, since it uses less digits than its factorization.

123417478440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6014536 (or 6014526 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 45.

The spelling of 123417478440 in words is "one hundred twenty-three billion, four hundred seventeen million, four hundred seventy-eight thousand, four hundred forty".