80765490 has 64 divisors (see below), whose sum is σ = 213881472. Its totient is φ = 19392000.

The previous prime is 80765483. The next prime is 80765497. The reversal of 80765490 is 9456708.

It is an interprime number because it is at equal distance from previous prime (80765483) and next prime (80765497).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80765497) 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, 13465 + ... + 18515.

It is an arithmetic number, because the mean of its divisors is an integer number (3341898).

Almost surely, 2^80765490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80765490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106940736).

80765490 is an abundant number, since it is smaller than the sum of its proper divisors (133115982).

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

80765490 is a wasteful number, since it uses less digits than its factorization.

80765490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5115.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 80765490 is about 8986.9622231319. The cubic root of 80765490 is about 432.2569095147.

The spelling of 80765490 in words is "eighty million, seven hundred sixty-five thousand, four hundred ninety".