80872740 has 288 divisors, whose sum is σ = 297198720. Its totient is φ = 17584128.

The previous prime is 80872739. The next prime is 80872777. The reversal of 80872740 is 4727808.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 80872695 and 80872704.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 755767 + ... + 755873.

It is an arithmetic number, because the mean of its divisors is an integer number (1031940).

Almost surely, 2^80872740 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 80872740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148599360).

80872740 is an abundant number, since it is smaller than the sum of its proper divisors (216325980).

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

80872740 is a wasteful number, since it uses less digits than its factorization.

80872740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 80872740 is about 8992.9272208775. The cubic root of 80872740 is about 432.4481588882.

The spelling of 80872740 in words is "eighty million, eight hundred seventy-two thousand, seven hundred forty".