80478831 has 4 divisors (see below), whose sum is σ = 107305112. Its totient is φ = 53652552.

The previous prime is 80478823. The next prime is 80478847. The reversal of 80478831 is 13887408.

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

It is not a de Polignac number, because 80478831 - 2³ = 80478823 is a prime.

It is a super-2 number, since 2×80478831² = 12953684478253122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80478831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80478031) 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, 13413136 + ... + 13413141.

It is an arithmetic number, because the mean of its divisors is an integer number (26826278).

Almost surely, 2^80478831 is an apocalyptic number.

80478831 is a deficient number, since it is larger than the sum of its proper divisors (26826281).

80478831 is a wasteful number, since it uses less digits than its factorization.

80478831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26826280.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 80478831 is about 8970.9994426485. Note that the first 3 decimals coincide. The cubic root of 80478831 is about 431.7449036217.

The spelling of 80478831 in words is "eighty million, four hundred seventy-eight thousand, eight hundred thirty-one".