658722420 has 54 divisors (see below), whose sum is σ = 1999169718. Its totient is φ = 175567488.

The previous prime is 658722413. The next prime is 658722431. The reversal of 658722420 is 24227856.

658722420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 299013264 + 359709156 = 17292^2 + 18966^2 .

It is a super-2 number, since 2×658722420² = 867830453221312800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 343384 + ... + 345296.

Almost surely, 2^658722420 is an apocalyptic number.

658722420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

658722420 is an abundant number, since it is smaller than the sum of its proper divisors (1340447298).

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

658722420 is a wasteful number, since it uses less digits than its factorization.

658722420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841 (or 1923 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 658722420 is about 25665.5882457426. The cubic root of 658722420 is about 870.0966202640.

The spelling of 658722420 in words is "six hundred fifty-eight million, seven hundred twenty-two thousand, four hundred twenty".