998400766 has 12 divisors (see below), whose sum is σ = 1646123976. Its totient is φ = 453818420.

The previous prime is 998400761. The next prime is 998400817. The reversal of 998400766 is 667004899.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998400761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2062570 + ... + 2063053.

It is an arithmetic number, because the mean of its divisors is an integer number (137176998).

Almost surely, 2^998400766 is an apocalyptic number.

998400766 is a deficient number, since it is larger than the sum of its proper divisors (647723210).

998400766 is a wasteful number, since it uses less digits than its factorization.

998400766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125647 (or 4125636 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 998400766 is about 31597.4803742324. The cubic root of 998400766 is about 999.4666375751.

The spelling of 998400766 in words is "nine hundred ninety-eight million, four hundred thousand, seven hundred sixty-six".