988405 has 8 divisors (see below), whose sum is σ = 1293984. Its totient is φ = 718800.

The previous prime is 988367. The next prime is 988409. The reversal of 988405 is 504889.

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

It is not a de Polignac number, because 988405 - 2¹⁷ = 857333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8931 + ... + 9040.

It is an arithmetic number, because the mean of its divisors is an integer number (161748).

2⁹⁸⁸⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

988405 is a deficient number, since it is larger than the sum of its proper divisors (305579).

988405 is a wasteful number, since it uses less digits than its factorization.

988405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17987.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 988405 is about 994.1855963551. The cubic root of 988405 is about 99.6119964798.

The spelling of 988405 in words is "nine hundred eighty-eight thousand, four hundred five".