80747478 has 24 divisors (see below), whose sum is σ = 199946448. Its totient is φ = 23070672.

The previous prime is 80747449. The next prime is 80747479. The reversal of 80747478 is 87474708.

It is a super-5 number, since 5×80747478⁵ (a number of 41 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80747479) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 320301 + ... + 320552.

It is an arithmetic number, because the mean of its divisors is an integer number (8331102).

Almost surely, 2^80747478 is an apocalyptic number.

80747478 is an abundant number, since it is smaller than the sum of its proper divisors (119198970).

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

80747478 is a wasteful number, since it uses less digits than its factorization.

80747478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640868 (or 640865 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The square root of 80747478 is about 8985.9600488762. The cubic root of 80747478 is about 432.2247737171.

It can be divided in two parts, 80747 and 478, that added together give a square (81225 = 285²).

The spelling of 80747478 in words is "eighty million, seven hundred forty-seven thousand, four hundred seventy-eight".