122497440 has 192 divisors, whose sum is σ = 423190656. Its totient is φ = 29601792.

The previous prime is 122497357. The next prime is 122497447. The reversal of 122497440 is 44794221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122497447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 417934 + ... + 418226.

It is an arithmetic number, because the mean of its divisors is an integer number (2204118).

Almost surely, 2^122497440 is an apocalyptic number.

122497440 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 122497440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211595328).

122497440 is an abundant number, since it is smaller than the sum of its proper divisors (300693216).

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

122497440 is a wasteful number, since it uses less digits than its factorization.

122497440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 122497440 is about 11067.8561609735. The cubic root of 122497440 is about 496.6407345488.

The spelling of 122497440 in words is "one hundred twenty-two million, four hundred ninety-seven thousand, four hundred forty".