122336640 has 192 divisors, whose sum is σ = 430101360. Its totient is φ = 32034816.

The previous prime is 122336639. The next prime is 122336657. The reversal of 122336640 is 46633221.

122336640 is a `hidden beast` number, since 12 + 2 + 3 + 3 + 6 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 385762 + ... + 386078.

Almost surely, 2^122336640 is an apocalyptic number.

122336640 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 122336640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215050680).

122336640 is an abundant number, since it is smaller than the sum of its proper divisors (307764720).

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

122336640 is a wasteful number, since it uses less digits than its factorization.

122336640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 122336640 is about 11060.5894960441. The cubic root of 122336640 is about 496.4233291916.

Adding to 122336640 its reverse (46633221), we get a palindrome (168969861).

The spelling of 122336640 in words is "one hundred twenty-two million, three hundred thirty-six thousand, six hundred forty".