72457775 has 12 divisors (see below), whose sum is σ = 96759432. Its totient is φ = 53507040.

The previous prime is 72457771. The next prime is 72457789. The reversal of 72457775 is 57775427.

It is not a de Polignac number, because 72457775 - 2² = 72457771 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 (72457771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111149 + ... + 111798.

It is an arithmetic number, because the mean of its divisors is an integer number (8063286).

Almost surely, 2^72457775 is an apocalyptic number.

72457775 is a deficient number, since it is larger than the sum of its proper divisors (24301657).

72457775 is a wasteful number, since it uses less digits than its factorization.

72457775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222970 (or 222965 counting only the distinct ones).

The product of its digits is 480200, while the sum is 44.

The square root of 72457775 is about 8512.2132844519. The cubic root of 72457775 is about 416.8965788913.

The spelling of 72457775 in words is "seventy-two million, four hundred fifty-seven thousand, seven hundred seventy-five".