998667772 has 12 divisors (see below), whose sum is σ = 1749156696. Its totient is φ = 498908720.

The previous prime is 998667767. The next prime is 998667773. The reversal of 998667772 is 277766899.

It is a self number, because there is not a number n which added to its sum of digits gives 998667772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998667773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100978 + ... + 110425.

It is an arithmetic number, because the mean of its divisors is an integer number (145763058).

Almost surely, 2^998667772 is an apocalyptic number.

It is an amenable number.

998667772 is a deficient number, since it is larger than the sum of its proper divisors (750488924).

998667772 is a wasteful number, since it uses less digits than its factorization.

998667772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212588 (or 212586 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 61.

The square root of 998667772 is about 31601.7052071561. The cubic root of 998667772 is about 999.5557266504. Note that the first 3 decimals are identical.

The spelling of 998667772 in words is "nine hundred ninety-eight million, six hundred sixty-seven thousand, seven hundred seventy-two".