80563440 has 40 divisors (see below), whose sum is σ = 249747408. Its totient is φ = 21483520.

The previous prime is 80563429. The next prime is 80563471. The reversal of 80563440 is 4436508.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a junction number, because it is equal to n+sod(n) for n = 80563398 and 80563407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167601 + ... + 168080.

Almost surely, 2^80563440 is an apocalyptic number.

80563440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80563440 is an abundant number, since it is smaller than the sum of its proper divisors (169183968).

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

80563440 is a wasteful number, since it uses less digits than its factorization.

80563440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335697 (or 335691 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 80563440 is about 8975.7138991837. The cubic root of 80563440 is about 431.8961513066.

Adding to 80563440 its reverse (4436508), we get a palindrome (84999948).

It can be divided in two parts, 80563 and 440, that added together give a triangular number (81003 = T₄₀₂).

The spelling of 80563440 in words is "eighty million, five hundred sixty-three thousand, four hundred forty".