80649738 has 48 divisors (see below), whose sum is σ = 188828640. Its totient is φ = 24730272.

The previous prime is 80649733. The next prime is 80649769. The reversal of 80649738 is 83794608.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 80649693 and 80649702.

It is not an unprimeable number, because it can be changed into a prime (80649731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122053 + ... + 122711.

It is an arithmetic number, because the mean of its divisors is an integer number (3933930).

Almost surely, 2^80649738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80649738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94414320).

80649738 is an abundant number, since it is smaller than the sum of its proper divisors (108178902).

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

80649738 is a wasteful number, since it uses less digits than its factorization.

80649738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203 (or 1200 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 80649738 is about 8980.5199181339. The cubic root of 80649738 is about 432.0503092130.

The spelling of 80649738 in words is "eighty million, six hundred forty-nine thousand, seven hundred thirty-eight".