80016990 has 32 divisors (see below), whose sum is σ = 192754080. Its totient is φ = 21258624.

The previous prime is 80016973. The next prime is 80016991. The reversal of 80016990 is 9961008.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80016991) 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, 3496 + ... + 13124.

It is an arithmetic number, because the mean of its divisors is an integer number (6023565).

Almost surely, 2^80016990 is an apocalyptic number.

80016990 is an abundant number, since it is smaller than the sum of its proper divisors (112737090).

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

80016990 is a wasteful number, since it uses less digits than its factorization.

80016990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9916.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 80016990 is about 8945.2216294511. The cubic root of 80016990 is about 430.9174390517.

Adding to 80016990 its reverse (9961008), we get a palindrome (89977998).

The spelling of 80016990 in words is "eighty million, sixteen thousand, nine hundred ninety".