122442840 has 448 divisors, whose sum is σ = 495784800. Its totient is φ = 26873856.

The previous prime is 122442797. The next prime is 122442841. The reversal of 122442840 is 48244221.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122442841) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 6444351 + ... + 6444369.

Almost surely, 2^122442840 is an apocalyptic number.

122442840 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 122442840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247892400).

122442840 is an abundant number, since it is smaller than the sum of its proper divisors (373341960).

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

122442840 is a wasteful number, since it uses less digits than its factorization.

122442840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 122442840 is about 11065.3892837080. The cubic root of 122442840 is about 496.5669354176.

The spelling of 122442840 in words is "one hundred twenty-two million, four hundred forty-two thousand, eight hundred forty".