998774 has 8 divisors (see below), whose sum is σ = 1712208. Its totient is φ = 428040.

The previous prime is 998759. The next prime is 998779. The reversal of 998774 is 477899.

998774 = 208² + 209² + ... + 228².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 15.

It is a nialpdrome in base 10.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 998774.

It is not an unprimeable number, because it can be changed into a prime (998779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35657 + ... + 35684.

It is an arithmetic number, because the mean of its divisors is an integer number (214026).

2⁹⁹⁸⁷⁷⁴ is an apocalyptic number.

998774 is a deficient number, since it is larger than the sum of its proper divisors (713434).

998774 is a wasteful number, since it uses less digits than its factorization.

998774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71350.

The product of its digits is 127008, while the sum is 44.

The square root of 998774 is about 999.3868120002. The cubic root of 998774 is about 99.9591166211.

The spelling of 998774 in words is "nine hundred ninety-eight thousand, seven hundred seventy-four".