998724228 has 48 divisors (see below), whose sum is σ = 2471172480. Its totient is φ = 312850944.

The previous prime is 998724217. The next prime is 998724229. The reversal of 998724228 is 822427899.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (998724229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146193 + ... + 152871.

It is an arithmetic number, because the mean of its divisors is an integer number (51482760).

Almost surely, 2^998724228 is an apocalyptic number.

It is an amenable number.

998724228 is an abundant number, since it is smaller than the sum of its proper divisors (1472448252).

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

998724228 is a wasteful number, since it uses less digits than its factorization.

998724228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7436 (or 7434 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 998724228 is about 31602.5984374703. The cubic root of 998724228 is about 999.5745616946.

The spelling of 998724228 in words is "nine hundred ninety-eight million, seven hundred twenty-four thousand, two hundred twenty-eight".