80404731 has 80 divisors (see below), whose sum is σ = 140507136. Its totient is φ = 45360000.

The previous prime is 80404717. The next prime is 80404739. The reversal of 80404731 is 13740408.

It is not a de Polignac number, because 80404731 - 2¹⁹ = 79880443 is a prime.

It is a super-2 number, since 2×80404731² = 12929841534364722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 80404695 and 80404704.

It is not an unprimeable number, because it can be changed into a prime (80404739) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1132426 + ... + 1132496.

Almost surely, 2^80404731 is an apocalyptic number.

80404731 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

80404731 is a deficient number, since it is larger than the sum of its proper divisors (60102405).

80404731 is a wasteful number, since it uses less digits than its factorization.

80404731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 80404731 is about 8966.8685169350. The cubic root of 80404731 is about 431.6123548059.

The spelling of 80404731 in words is "eighty million, four hundred four thousand, seven hundred thirty-one".