115021840 has 20 divisors (see below), whose sum is σ = 267425964. Its totient is φ = 46008704.

The previous prime is 115021817. The next prime is 115021871. The reversal of 115021840 is 48120511.

It can be written as a sum of positive squares in 2 ways, for example, as 34668544 + 80353296 = 5888^2 + 8964^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 718807 + ... + 718966.

Almost surely, 2^115021840 is an apocalyptic number.

115021840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115021840 is an abundant number, since it is smaller than the sum of its proper divisors (152404124).

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

115021840 is a wasteful number, since it uses less digits than its factorization.

115021840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1437786 (or 1437780 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 115021840 is about 10724.8235416719. The cubic root of 115021840 is about 486.3251957115.

The spelling of 115021840 in words is "one hundred fifteen million, twenty-one thousand, eight hundred forty".