655840398 has 16 divisors (see below), whose sum is σ = 1311932160. Its totient is φ = 218571576.

The previous prime is 655840373. The next prime is 655840403. The reversal of 655840398 is 893048556.

It is a happy number.

655840398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53611 + ... + 64697.

It is an arithmetic number, because the mean of its divisors is an integer number (81995760).

Almost surely, 2^655840398 is an apocalyptic number.

655840398 is an abundant number, since it is smaller than the sum of its proper divisors (656091762).

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

655840398 is a wasteful number, since it uses less digits than its factorization.

655840398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20951.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The square root of 655840398 is about 25609.3810546058. The cubic root of 655840398 is about 868.8258251848.

The spelling of 655840398 in words is "six hundred fifty-five million, eight hundred forty thousand, three hundred ninety-eight".