115423440 has 80 divisors (see below), whose sum is σ = 390350016. Its totient is φ = 27980800.

The previous prime is 115423433. The next prime is 115423471. The reversal of 115423440 is 44324511.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 115423440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19221 + ... + 24500.

Almost surely, 2^115423440 is an apocalyptic number.

115423440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115423440 is an abundant number, since it is smaller than the sum of its proper divisors (274926576).

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

115423440 is a wasteful number, since it uses less digits than its factorization.

115423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43748 (or 43742 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 115423440 is about 10743.5301460926. The cubic root of 115423440 is about 486.8905414800.

Adding to 115423440 its reverse (44324511), we get a palindrome (159747951).

The spelling of 115423440 in words is "one hundred fifteen million, four hundred twenty-three thousand, four hundred forty".