122489280 has 112 divisors (see below), whose sum is σ = 432145440. Its totient is φ = 32661504.

The previous prime is 122489273. The next prime is 122489287. The reversal of 122489280 is 82984221.

It is an interprime number because it is at equal distance from previous prime (122489273) and next prime (122489287).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122489287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1552 + ... + 15728.

Almost surely, 2^122489280 is an apocalyptic number.

122489280 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 122489280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216072720).

122489280 is an abundant number, since it is smaller than the sum of its proper divisors (309656160).

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

122489280 is a wasteful number, since it uses less digits than its factorization.

122489280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14203 (or 14187 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 122489280 is about 11067.4875197580. The cubic root of 122489280 is about 496.6297066221.

It can be divided in two parts, 12248 and 9280, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 122489280 in words is "one hundred twenty-two million, four hundred eighty-nine thousand, two hundred eighty".