72278071 has 16 divisors (see below), whose sum is σ = 77932800. Its totient is φ = 66830400.

The previous prime is 72278053. The next prime is 72278083. The reversal of 72278071 is 17087227.

It is a cyclic number.

It is not a de Polignac number, because 72278071 - 2⁹ = 72277559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72278021) 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 15 ways as a sum of consecutive naturals, for example, 176515 + ... + 176923.

It is an arithmetic number, because the mean of its divisors is an integer number (4870800).

Almost surely, 2^72278071 is an apocalyptic number.

72278071 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

72278071 is a deficient number, since it is larger than the sum of its proper divisors (5654729).

72278071 is a wasteful number, since it uses less digits than its factorization.

72278071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630.

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 72278071 is about 8501.6510749383. The cubic root of 72278071 is about 416.5516423473.

The spelling of 72278071 in words is "seventy-two million, two hundred seventy-eight thousand, seventy-one".