80919936 has 96 divisors (see below), whose sum is σ = 245177400. Its totient is φ = 25546752.

The previous prime is 80919931. The next prime is 80919941. The reversal of 80919936 is 63991908.

It is an interprime number because it is at equal distance from previous prime (80919931) and next prime (80919941).

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

It is a junction number, because it is equal to n+sod(n) for n = 80919891 and 80919900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80919931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20040 + ... + 23736.

Almost surely, 2^80919936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80919936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122588700).

80919936 is an abundant number, since it is smaller than the sum of its proper divisors (164257464).

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

80919936 is a wasteful number, since it uses less digits than its factorization.

80919936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3736 (or 3721 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 80919936 is about 8995.5509003062. The cubic root of 80919936 is about 432.5322657385.

The spelling of 80919936 in words is "eighty million, nine hundred nineteen thousand, nine hundred thirty-six".