990729432 has 240 divisors, whose sum is σ = 3421365480. Its totient is φ = 256838400.

The previous prime is 990729401. The next prime is 990729437. The reversal of 990729432 is 234927099.

990729432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990729437) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 1901332 + ... + 1901852.

Almost surely, 2^990729432 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 990729432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1710682740).

990729432 is an abundant number, since it is smaller than the sum of its proper divisors (2430636048).

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

990729432 is a wasteful number, since it uses less digits than its factorization.

990729432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 990729432 is about 31475.8547461383. The cubic root of 990729432 is about 996.9002119088.

The spelling of 990729432 in words is "nine hundred ninety million, seven hundred twenty-nine thousand, four hundred thirty-two".