80739456 has 128 divisors (see below), whose sum is σ = 250512000. Its totient is φ = 23030784.

The previous prime is 80739437. The next prime is 80739457. The reversal of 80739456 is 65493708.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is not an unprimeable number, because it can be changed into a prime (80739457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131406 + ... + 132018.

It is an arithmetic number, because the mean of its divisors is an integer number (1957125).

Almost surely, 2^80739456 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 80739456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125256000).

80739456 is an abundant number, since it is smaller than the sum of its proper divisors (169772544).

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

80739456 is an equidigital number, since it uses as much as digits as its factorization.

80739456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 625 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 80739456 is about 8985.5136747990. The cubic root of 80739456 is about 432.2104598667.

The spelling of 80739456 in words is "eighty million, seven hundred thirty-nine thousand, four hundred fifty-six".