80740920 has 128 divisors (see below), whose sum is σ = 264801600. Its totient is φ = 19574784.

The previous prime is 80740897. The next prime is 80740921. The reversal of 80740920 is 2904708.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80740921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113526 + ... + 114234.

Almost surely, 2^80740920 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 80740920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132400800).

80740920 is an abundant number, since it is smaller than the sum of its proper divisors (184060680).

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

80740920 is a wasteful number, since it uses less digits than its factorization.

80740920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 80740920 is about 8985.5951388876. The cubic root of 80740920 is about 432.2130721884.

The spelling of 80740920 in words is "eighty million, seven hundred forty thousand, nine hundred twenty".