72758481 has 16 divisors (see below), whose sum is σ = 98915520. Its totient is φ = 47563200.

The previous prime is 72758471. The next prime is 72758501. The reversal of 72758481 is 18485727.

It is not a de Polignac number, because 72758481 - 2⁶ = 72758417 is a prime.

It is a super-2 number, since 2×72758481² = 10587593114854722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72758401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31926 + ... + 34128.

It is an arithmetic number, because the mean of its divisors is an integer number (6182220).

Almost surely, 2^72758481 is an apocalyptic number.

It is an amenable number.

72758481 is a deficient number, since it is larger than the sum of its proper divisors (26157039).

72758481 is a wasteful number, since it uses less digits than its factorization.

72758481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416.

The product of its digits is 125440, while the sum is 42.

The square root of 72758481 is about 8529.8582051521. The cubic root of 72758481 is about 417.4725018044.

The spelling of 72758481 in words is "seventy-two million, seven hundred fifty-eight thousand, four hundred eighty-one".