550812990 has 128 divisors (see below), whose sum is σ = 1646023680. Its totient is φ = 114859008.

The previous prime is 550812973. The next prime is 550813001. The reversal of 550812990 is 99218055.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 241837 + ... + 244103.

It is an arithmetic number, because the mean of its divisors is an integer number (12859560).

Almost surely, 2^550812990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550812990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (823011840).

550812990 is an abundant number, since it is smaller than the sum of its proper divisors (1095210690).

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

550812990 is a wasteful number, since it uses less digits than its factorization.

550812990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 550812990 is about 23469.4054036313. The cubic root of 550812990 is about 819.7247688233.

The spelling of 550812990 in words is "five hundred fifty million, eight hundred twelve thousand, nine hundred ninety".