659409408 has 120 divisors (see below), whose sum is σ = 2175078048. Its totient is φ = 188393472.

The previous prime is 659409407. The next prime is 659409409. The reversal of 659409408 is 804904956.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (659409407) and next prime (659409409).

It is not an unprimeable number, because it can be changed into a prime (659409403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22035 + ... + 42477.

Almost surely, 2^659409408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 659409408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1087539024).

659409408 is an abundant number, since it is smaller than the sum of its proper divisors (1515668640).

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

659409408 is a wasteful number, since it uses less digits than its factorization.

659409408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20474 (or 20455 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 659409408 is about 25678.9682035708. The cubic root of 659409408 is about 870.3989925738.

The spelling of 659409408 in words is "six hundred fifty-nine million, four hundred nine thousand, four hundred eight".