990389829 has 32 divisors (see below), whose sum is σ = 1601445888. Its totient is φ = 536184000.

The previous prime is 990389789. The next prime is 990389833. The reversal of 990389829 is 928983099.

It is not a de Polignac number, because 990389829 - 2¹² = 990385733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990389879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23937 + ... + 50534.

It is an arithmetic number, because the mean of its divisors is an integer number (50045184).

Almost surely, 2^990389829 is an apocalyptic number.

It is an amenable number.

990389829 is a deficient number, since it is larger than the sum of its proper divisors (611056059).

990389829 is a wasteful number, since it uses less digits than its factorization.

990389829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74529.

The product of its (nonzero) digits is 2519424, while the sum is 57.

The square root of 990389829 is about 31470.4596248609. The cubic root of 990389829 is about 996.7862928164.

The spelling of 990389829 in words is "nine hundred ninety million, three hundred eighty-nine thousand, eight hundred twenty-nine".