80349990 has 128 divisors (see below), whose sum is σ = 237385728. Its totient is φ = 16988160.

The previous prime is 80349989. The next prime is 80350003. The reversal of 80349990 is 9994308.

It is a super-2 number, since 2×80349990² = 12912241786000200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 253312 + ... + 253628.

It is an arithmetic number, because the mean of its divisors is an integer number (1854576).

Almost surely, 2^80349990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80349990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118692864).

80349990 is an abundant number, since it is smaller than the sum of its proper divisors (157035738).

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

80349990 is a wasteful number, since it uses less digits than its factorization.

80349990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 80349990 is about 8963.8155938194. The cubic root of 80349990 is about 431.5143827276.

The spelling of 80349990 in words is "eighty million, three hundred forty-nine thousand, nine hundred ninety".