990291652 has 48 divisors (see below), whose sum is σ = 2115025920. Its totient is φ = 396547200.

The previous prime is 990291649. The next prime is 990291671. The reversal of 990291652 is 256192099.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 990291599 and 990291608.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5502 + ... + 44842.

It is an arithmetic number, because the mean of its divisors is an integer number (44063040).

Almost surely, 2^990291652 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 990291652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1057512960).

990291652 is an abundant number, since it is smaller than the sum of its proper divisors (1124734268).

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

990291652 is a wasteful number, since it uses less digits than its factorization.

990291652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39412 (or 39410 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 990291652 is about 31468.8997583328. The cubic root of 990291652 is about 996.7533547016.

The spelling of 990291652 in words is "nine hundred ninety million, two hundred ninety-one thousand, six hundred fifty-two".