659394040 has 64 divisors (see below), whose sum is σ = 1524096000. Its totient is φ = 256663680.

The previous prime is 659394023. The next prime is 659394049. The reversal of 659394040 is 40493956.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 659393984 and 659394002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (659394049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222891 + ... + 225829.

It is an arithmetic number, because the mean of its divisors is an integer number (23814000).

Almost surely, 2^659394040 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 659394040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (762048000).

659394040 is an abundant number, since it is smaller than the sum of its proper divisors (864701960).

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

659394040 is a wasteful number, since it uses less digits than its factorization.

659394040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3100 (or 3096 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 659394040 is about 25678.6689686206. The cubic root of 659394040 is about 870.3922307677.

The spelling of 659394040 in words is "six hundred fifty-nine million, three hundred ninety-four thousand, forty".