998772620 has 48 divisors (see below), whose sum is σ = 2238969600. Its totient is φ = 373141440.

The previous prime is 998772571. The next prime is 998772637. The reversal of 998772620 is 26277899.

It is a happy 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, 8471 + ... + 45489.

It is an arithmetic number, because the mean of its divisors is an integer number (46645200).

Almost surely, 2^998772620 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 998772620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119484800).

998772620 is an abundant number, since it is smaller than the sum of its proper divisors (1240196980).

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

998772620 is a wasteful number, since it uses less digits than its factorization.

998772620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37118 (or 37116 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 998772620 is about 31603.3640614413. The cubic root of 998772620 is about 999.5907058345.

The spelling of 998772620 in words is "nine hundred ninety-eight million, seven hundred seventy-two thousand, six hundred twenty".