990709536 has 24 divisors (see below), whose sum is σ = 2600612784. Its totient is φ = 330236480.

The previous prime is 990709529. The next prime is 990709537. The reversal of 990709536 is 635907099.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (990709537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5159850 + ... + 5160041.

It is an arithmetic number, because the mean of its divisors is an integer number (108358866).

Almost surely, 2^990709536 is an apocalyptic number.

990709536 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

990709536 is an abundant number, since it is smaller than the sum of its proper divisors (1609903248).

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

990709536 is a wasteful number, since it uses less digits than its factorization.

990709536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10319904 (or 10319896 counting only the distinct ones).

The product of its (nonzero) digits is 459270, while the sum is 48.

The square root of 990709536 is about 31475.5386927690. The cubic root of 990709536 is about 996.8935385565.

The spelling of 990709536 in words is "nine hundred ninety million, seven hundred nine thousand, five hundred thirty-six".