120512440 has 64 divisors (see below), whose sum is σ = 286999200. Its totient is φ = 45416448.

The previous prime is 120512423. The next prime is 120512443. The reversal of 120512440 is 44215021.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120512443) 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, 195012 + ... + 195628.

Almost surely, 2^120512440 is an apocalyptic number.

120512440 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 120512440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143499600).

120512440 is an abundant number, since it is smaller than the sum of its proper divisors (166486760).

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

120512440 is a wasteful number, since it uses less digits than its factorization.

120512440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 120512440 is about 10977.8158118999. The cubic root of 120512440 is about 493.9435210007.

Adding to 120512440 its reverse (44215021), we get a palindrome (164727461).

The spelling of 120512440 in words is "one hundred twenty million, five hundred twelve thousand, four hundred forty".