340239987 has 16 divisors (see below), whose sum is σ = 506030880. Its totient is φ = 225939456.

The previous prime is 340239983. The next prime is 340239997. The reversal of 340239987 is 789932043.

It is a happy number.

It is not a de Polignac number, because 340239987 - 2² = 340239983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (340239983) 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, 17578 + ... + 31455.

It is an arithmetic number, because the mean of its divisors is an integer number (31626930).

Almost surely, 2^340239987 is an apocalyptic number.

340239987 is a deficient number, since it is larger than the sum of its proper divisors (165790893).

340239987 is a wasteful number, since it uses less digits than its factorization.

340239987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49299 (or 49293 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 340239987 is about 18445.5953278825. The cubic root of 340239987 is about 698.1173814572.

The spelling of 340239987 in words is "three hundred forty million, two hundred thirty-nine thousand, nine hundred eighty-seven".