72687457 has 8 divisors (see below), whose sum is σ = 74545920. Its totient is φ = 70852320.

The previous prime is 72687449. The next prime is 72687463. The reversal of 72687457 is 75478627.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72687457 - 2³ = 72687449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72687437) 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 7 ways as a sum of consecutive naturals, for example, 568 + ... + 12070.

It is an arithmetic number, because the mean of its divisors is an integer number (9318240).

Almost surely, 2^72687457 is an apocalyptic number.

It is an amenable number.

72687457 is a deficient number, since it is larger than the sum of its proper divisors (1858463).

72687457 is a wasteful number, since it uses less digits than its factorization.

72687457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11663.

The product of its digits is 658560, while the sum is 46.

The square root of 72687457 is about 8525.6939307015. The cubic root of 72687457 is about 417.3366174388.

The spelling of 72687457 in words is "seventy-two million, six hundred eighty-seven thousand, four hundred fifty-seven".