115144020 has 36 divisors (see below), whose sum is σ = 349270740. Its totient is φ = 30705024.

The previous prime is 115143997. The next prime is 115144033. The reversal of 115144020 is 20441511.

It can be written as a sum of positive squares in 2 ways, for example, as 47279376 + 67864644 = 6876^2 + 8238^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 115143984 and 115144002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319665 + ... + 320024.

It is an arithmetic number, because the mean of its divisors is an integer number (9701965).

Almost surely, 2^115144020 is an apocalyptic number.

115144020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115144020 is an abundant number, since it is smaller than the sum of its proper divisors (234126720).

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

115144020 is a wasteful number, since it uses less digits than its factorization.

115144020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639704 (or 639699 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 115144020 is about 10730.5181608345. The cubic root of 115144020 is about 486.4973316751.

Adding to 115144020 its reverse (20441511), we get a palindrome (135585531).

The spelling of 115144020 in words is "one hundred fifteen million, one hundred forty-four thousand, twenty".