115439290 has 8 divisors (see below), whose sum is σ = 207790740. Its totient is φ = 46175712.

The previous prime is 115439287. The next prime is 115439293. The reversal of 115439290 is 92934511.

It is an interprime number because it is at equal distance from previous prime (115439287) and next prime (115439293).

It can be written as a sum of positive squares in 2 ways, for example, as 112593321 + 2845969 = 10611^2 + 1687^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (115439293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5771955 + ... + 5771974.

Almost surely, 2^115439290 is an apocalyptic number.

115439290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115439290 is a deficient number, since it is larger than the sum of its proper divisors (92351450).

115439290 is a wasteful number, since it uses less digits than its factorization.

115439290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11543936.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 115439290 is about 10744.2677740272. The cubic root of 115439290 is about 486.9128271378.

The spelling of 115439290 in words is "one hundred fifteen million, four hundred thirty-nine thousand, two hundred ninety".