990055776 has 96 divisors (see below), whose sum is σ = 2641766400. Its totient is φ = 324624384.

The previous prime is 990055771. The next prime is 990055777. The reversal of 990055776 is 677550099.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990055771) 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, 2204800 + ... + 2205248.

It is an arithmetic number, because the mean of its divisors is an integer number (27518400).

Almost surely, 2^990055776 is an apocalyptic number.

990055776 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990055776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320883200).

990055776 is an abundant number, since it is smaller than the sum of its proper divisors (1651710624).

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

990055776 is a wasteful number, since it uses less digits than its factorization.

990055776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 595350, while the sum is 48.

The square root of 990055776 is about 31465.1517714439. The cubic root of 990055776 is about 996.6742100499.

The spelling of 990055776 in words is "nine hundred ninety million, fifty-five thousand, seven hundred seventy-six".