990438741 has 12 divisors (see below), whose sum is σ = 1435520268. Its totient is φ = 658037184.

The previous prime is 990438671. The next prime is 990438781. The reversal of 990438741 is 147834099.

990438741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 933058116 + 57380625 = 30546^2 + 7575^2 .

It is not a de Polignac number, because 990438741 - 2¹³ = 990430549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990438781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185160 + ... + 190433.

It is an arithmetic number, because the mean of its divisors is an integer number (119626689).

Almost surely, 2^990438741 is an apocalyptic number.

It is an amenable number.

990438741 is a deficient number, since it is larger than the sum of its proper divisors (445081527).

990438741 is a wasteful number, since it uses less digits than its factorization.

990438741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375892 (or 375889 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 990438741 is about 31471.2367249843. The cubic root of 990438741 is about 996.8027018462.

The spelling of 990438741 in words is "nine hundred ninety million, four hundred thirty-eight thousand, seven hundred forty-one".