122399994240 has 768 divisors, whose sum is σ = 481713523200. Its totient is φ = 29561241600.

The previous prime is 122399994239. The next prime is 122399994247. The reversal of 122399994240 is 42499993221.

122399994240 is a `hidden beast` number, since 1 + 2 + 2 + 399 + 9 + 9 + 4 + 240 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122399994247) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 67961340 + ... + 67963140.

It is an arithmetic number, because the mean of its divisors is an integer number (627231150).

Almost surely, 2^122399994240 is an apocalyptic number.

122399994240 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 122399994240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240856761600).

122399994240 is an abundant number, since it is smaller than the sum of its proper divisors (359313528960).

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

122399994240 is a wasteful number, since it uses less digits than its factorization.

122399994240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877 (or 1853 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The spelling of 122399994240 in words is "one hundred twenty-two billion, three hundred ninety-nine million, nine hundred ninety-four thousand, two hundred forty".