990389534 has 8 divisors (see below), whose sum is σ = 1509938328. Its totient is φ = 487076760.

The previous prime is 990389531. The next prime is 990389549. The reversal of 990389534 is 435983099.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990389531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4058852 + ... + 4059095.

It is an arithmetic number, because the mean of its divisors is an integer number (188742291).

Almost surely, 2^990389534 is an apocalyptic number.

990389534 is a deficient number, since it is larger than the sum of its proper divisors (519548794).

990389534 is a wasteful number, since it uses less digits than its factorization.

990389534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8118010.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The square root of 990389534 is about 31470.4549379255. The cubic root of 990389534 is about 996.7861938480.

The spelling of 990389534 in words is "nine hundred ninety million, three hundred eighty-nine thousand, five hundred thirty-four".