72442785 has 32 divisors (see below), whose sum is σ = 118879488. Its totient is φ = 37656320.

The previous prime is 72442771. The next prime is 72442793. The reversal of 72442785 is 58724427.

It is not a de Polignac number, because 72442785 - 2⁹ = 72442273 is a prime.

It is a super-3 number, since 3×72442785³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 232780 + ... + 233090.

It is an arithmetic number, because the mean of its divisors is an integer number (3714984).

Almost surely, 2^72442785 is an apocalyptic number.

It is an amenable number.

72442785 is a deficient number, since it is larger than the sum of its proper divisors (46436703).

72442785 is a wasteful number, since it uses less digits than its factorization.

72442785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665.

The product of its digits is 125440, while the sum is 39.

The square root of 72442785 is about 8511.3327393540. The cubic root of 72442785 is about 416.8678278442.

The spelling of 72442785 in words is "seventy-two million, four hundred forty-two thousand, seven hundred eighty-five".