80440487 has 4 divisors (see below), whose sum is σ = 82311240. Its totient is φ = 78569736.

The previous prime is 80440457. The next prime is 80440489. The reversal of 80440487 is 78404408.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80440487 - 2²⁶ = 13331623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80440489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 935312 + ... + 935397.

It is an arithmetic number, because the mean of its divisors is an integer number (20577810).

Almost surely, 2^80440487 is an apocalyptic number.

80440487 is a deficient number, since it is larger than the sum of its proper divisors (1870753).

80440487 is a wasteful number, since it uses less digits than its factorization.

80440487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870752.

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 80440487 is about 8968.8620794391. The cubic root of 80440487 is about 431.6763246913.

The spelling of 80440487 in words is "eighty million, four hundred forty thousand, four hundred eighty-seven".