8340399240 has 64 divisors (see below), whose sum is σ = 26493039360. Its totient is φ = 2093276160.

The previous prime is 8340399229. The next prime is 8340399271. The reversal of 8340399240 is 429930438.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 8340399192 and 8340399201.

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, 2042176 + ... + 2046255.

It is an arithmetic number, because the mean of its divisors is an integer number (413953740).

Almost surely, 2^8340399240 is an apocalyptic number.

It is an amenable number.

8340399240 is an abundant number, since it is smaller than the sum of its proper divisors (18152640120).

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

8340399240 is a wasteful number, since it uses less digits than its factorization.

8340399240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088462 (or 4088458 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 8340399240 is about 91325.7862818602. The cubic root of 8340399240 is about 2027.9735202671.

The spelling of 8340399240 in words is "eight billion, three hundred forty million, three hundred ninety-nine thousand, two hundred forty".