122400078 has 8 divisors (see below), whose sum is σ = 244800168. Its totient is φ = 40800024.

The previous prime is 122400077. The next prime is 122400149. The reversal of 122400078 is 870004221.

It is a sphenic number, since it is the product of 3 distinct primes.

122400078 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122400077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10200001 + ... + 10200012.

It is an arithmetic number, because the mean of its divisors is an integer number (30600021).

Almost surely, 2^122400078 is an apocalyptic number.

122400078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

122400078 is a wasteful number, since it uses less digits than its factorization.

122400078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20400018.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 122400078 is about 11063.4568738708. The cubic root of 122400078 is about 496.5091215901.

Adding to 122400078 its reverse (870004221), we get a palindrome (992404299).

The spelling of 122400078 in words is "one hundred twenty-two million, four hundred thousand, seventy-eight".