8991598420 has 48 divisors (see below), whose sum is σ = 22081707648. Its totient is φ = 3011137920.

The previous prime is 8991598411. The next prime is 8991598457. The reversal of 8991598420 is 248951998.

It is a congruent number.

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, 740791 + ... + 752830.

It is an arithmetic number, because the mean of its divisors is an integer number (460035576).

Almost surely, 2^8991598420 is an apocalyptic number.

It is an amenable number.

8991598420 is an abundant number, since it is smaller than the sum of its proper divisors (13090109228).

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

8991598420 is a wasteful number, since it uses less digits than its factorization.

8991598420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493680 (or 1493678 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 55.

The square root of 8991598420 is about 94824.0392516581. The cubic root of 8991598420 is about 2079.4363626273.

The spelling of 8991598420 in words is "eight billion, nine hundred ninety-one million, five hundred ninety-eight thousand, four hundred twenty".