80438505 has 32 divisors (see below), whose sum is σ = 147661824. Its totient is φ = 36628416.

The previous prime is 80438503. The next prime is 80438513. The reversal of 80438505 is 50583408.

It is a happy number.

It is not a de Polignac number, because 80438505 - 2¹ = 80438503 is a prime.

It is a super-3 number, since 3×80438505³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (80438503) 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, 28362 + ... + 31068.

It is an arithmetic number, because the mean of its divisors is an integer number (4614432).

Almost surely, 2^80438505 is an apocalyptic number.

It is an amenable number.

80438505 is a deficient number, since it is larger than the sum of its proper divisors (67223319).

80438505 is a wasteful number, since it uses less digits than its factorization.

80438505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005.

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 80438505 is about 8968.7515853657. The cubic root of 80438505 is about 431.6727792565.

The spelling of 80438505 in words is "eighty million, four hundred thirty-eight thousand, five hundred five".