80999672 has 48 divisors (see below), whose sum is σ = 165863880. Its totient is φ = 37065600.

The previous prime is 80999671. The next prime is 80999687. The reversal of 80999672 is 27699908.

It is a self number, because there is not a number n which added to its sum of digits gives 80999672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80999671) 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, 244547 + ... + 244877.

Almost surely, 2^80999672 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 80999672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82931940).

80999672 is an abundant number, since it is smaller than the sum of its proper divisors (84864208).

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

80999672 is a wasteful number, since it uses less digits than its factorization.

80999672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 80999672 is about 8999.9817777593. The cubic root of 80999672 is about 432.6742870694.

It can be divided in two parts, 8099 and 9672, that added together give a palindrome (17771).

The spelling of 80999672 in words is "eighty million, nine hundred ninety-nine thousand, six hundred seventy-two".