990777792 has 112 divisors (see below), whose sum is σ = 2748759552. Its totient is φ = 314603520.

The previous prime is 990777791. The next prime is 990777793. The reversal of 990777792 is 297777099.

It is an interprime number because it is at equal distance from previous prime (990777791) and next prime (990777793).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990777791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337033 + ... + 339959.

It is an arithmetic number, because the mean of its divisors is an integer number (24542496).

Almost surely, 2^990777792 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 990777792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1374379776).

990777792 is an abundant number, since it is smaller than the sum of its proper divisors (1757981760).

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

990777792 is a wasteful number, since it uses less digits than its factorization.

990777792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026 (or 3016 counting only the distinct ones).

The product of its (nonzero) digits is 3500658, while the sum is 57.

The square root of 990777792 is about 31476.6229446553. The cubic root of 990777792 is about 996.9164320486.

The spelling of 990777792 in words is "nine hundred ninety million, seven hundred seventy-seven thousand, seven hundred ninety-two".