72158687 has 8 divisors (see below), whose sum is σ = 73983360. Its totient is φ = 70340760.

The previous prime is 72158663. The next prime is 72158689. The reversal of 72158687 is 78685127.

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

It is a cyclic number.

It is not a de Polignac number, because 72158687 - 2⁸ = 72158431 is a prime.

It is a super-2 number, since 2×72158687² = 10413752219127938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72158689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25262 + ... + 27972.

It is an arithmetic number, because the mean of its divisors is an integer number (9247920).

Almost surely, 2^72158687 is an apocalyptic number.

72158687 is a deficient number, since it is larger than the sum of its proper divisors (1824673).

72158687 is a wasteful number, since it uses less digits than its factorization.

72158687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373.

The product of its digits is 188160, while the sum is 44.

The square root of 72158687 is about 8494.6269488424. The cubic root of 72158687 is about 416.3221720726.

The spelling of 72158687 in words is "seventy-two million, one hundred fifty-eight thousand, six hundred eighty-seven".