122740408 has 64 divisors (see below), whose sum is σ = 287539200. Its totient is φ = 47900160.

The previous prime is 122740403. The next prime is 122740417. The reversal of 122740408 is 804047221.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122740403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27433 + ... + 31591.

It is an arithmetic number, because the mean of its divisors is an integer number (4492800).

Almost surely, 2^122740408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122740408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143769600).

122740408 is an abundant number, since it is smaller than the sum of its proper divisors (164798792).

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

122740408 is a wasteful number, since it uses less digits than its factorization.

122740408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4220 (or 4216 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 122740408 is about 11078.8270137231. The cubic root of 122740408 is about 496.9688723290.

Adding to 122740408 its reverse (804047221), we get a palindrome (926787629).

The spelling of 122740408 in words is "one hundred twenty-two million, seven hundred forty thousand, four hundred eight".