72859634 has 4 divisors (see below), whose sum is σ = 109289454. Its totient is φ = 36429816.

The previous prime is 72859613. The next prime is 72859639. The reversal of 72859634 is 43695827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43695827 = 7 ⋅6242261.

It can be written as a sum of positive squares in only one way, i.e., 71656225 + 1203409 = 8465^2 + 1097^2 .

It is a super-2 number, since 2×72859634² = 10617052533227912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72859639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18214907 + ... + 18214910.

Almost surely, 2^72859634 is an apocalyptic number.

72859634 is a deficient number, since it is larger than the sum of its proper divisors (36429820).

72859634 is a wasteful number, since it uses less digits than its factorization.

72859634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36429819.

The product of its digits is 362880, while the sum is 44.

The square root of 72859634 is about 8535.7854940246. The cubic root of 72859634 is about 417.6658769316.

The spelling of 72859634 in words is "seventy-two million, eight hundred fifty-nine thousand, six hundred thirty-four".