990040632 has 64 divisors (see below), whose sum is σ = 2847744000. Its totient is φ = 280963200.

The previous prime is 990040631. The next prime is 990040637. The reversal of 990040632 is 236040099.

It is a junction number, because it is equal to n+sod(n) for n = 990040593 and 990040602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990040631) 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 15 ways as a sum of consecutive naturals, for example, 5257 + ... + 44807.

It is an arithmetic number, because the mean of its divisors is an integer number (44496000).

Almost surely, 2^990040632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990040632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1423872000).

990040632 is an abundant number, since it is smaller than the sum of its proper divisors (1857703368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

990040632 is a wasteful number, since it uses less digits than its factorization.

990040632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39716 (or 39712 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 990040632 is about 31464.9111233450. The cubic root of 990040632 is about 996.6691282786.

The spelling of 990040632 in words is "nine hundred ninety million, forty thousand, six hundred thirty-two".