71782678 has 16 divisors (see below), whose sum is σ = 122570496. Its totient is φ = 31209640.

The previous prime is 71782651. The next prime is 71782679. The reversal of 71782678 is 87628717.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71782679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70426 + ... + 71437.

It is an arithmetic number, because the mean of its divisors is an integer number (7660656).

Almost surely, 2^71782678 is an apocalyptic number.

71782678 is a deficient number, since it is larger than the sum of its proper divisors (50787818).

71782678 is a wasteful number, since it uses less digits than its factorization.

71782678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141899.

The product of its digits is 263424, while the sum is 46.

The square root of 71782678 is about 8472.4658748206. The cubic root of 71782678 is about 415.5977798368.

The spelling of 71782678 in words is "seventy-one million, seven hundred eighty-two thousand, six hundred seventy-eight".