998779032 has 64 divisors (see below), whose sum is σ = 2782821600. Its totient is φ = 331914240.

The previous prime is 998779031. The next prime is 998779037. The reversal of 998779032 is 230977899.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 998779032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998779031) 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, 65932 + ... + 79652.

Almost surely, 2^998779032 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 998779032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1391410800).

998779032 is an abundant number, since it is smaller than the sum of its proper divisors (1784042568).

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

998779032 is a wasteful number, since it uses less digits than its factorization.

998779032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14073 (or 14063 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The square root of 998779032 is about 31603.4655061751. The cubic root of 998779032 is about 999.5928449139.

The spelling of 998779032 in words is "nine hundred ninety-eight million, seven hundred seventy-nine thousand, thirty-two".