988431 has 8 divisors (see below), whose sum is σ = 1395504. Its totient is φ = 620160.

The previous prime is 988417. The next prime is 988439. The reversal of 988431 is 134889.

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

It is not a de Polignac number, because 988431 - 2⁶ = 988367 is a prime.

It is a super-2 number, since 2×988431² = 1953991683522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 988392 and 988401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9640 + ... + 9741.

It is an arithmetic number, because the mean of its divisors is an integer number (174438).

2⁹⁸⁸⁴³¹ is an apocalyptic number.

988431 is a deficient number, since it is larger than the sum of its proper divisors (407073).

988431 is a wasteful number, since it uses less digits than its factorization.

988431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19401.

The product of its digits is 6912, while the sum is 33.

The square root of 988431 is about 994.1986722984. The cubic root of 988431 is about 99.6128699035.

The spelling of 988431 in words is "nine hundred eighty-eight thousand, four hundred thirty-one".