72128853 has 16 divisors (see below), whose sum is σ = 107265600. Its totient is φ = 47902320.

The previous prime is 72128839. The next prime is 72128867. The reversal of 72128853 is 35882127.

It is an interprime number because it is at equal distance from previous prime (72128839) and next prime (72128867).

It is not a de Polignac number, because 72128853 - 2¹⁰ = 72127829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72128753) 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, 2298 + ... + 12228.

It is an arithmetic number, because the mean of its divisors is an integer number (6704100).

Almost surely, 2^72128853 is an apocalyptic number.

It is an amenable number.

72128853 is a deficient number, since it is larger than the sum of its proper divisors (35136747).

72128853 is a wasteful number, since it uses less digits than its factorization.

72128853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10209 (or 10203 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 72128853 is about 8492.8707160771. The cubic root of 72128853 is about 416.2647880470.

The spelling of 72128853 in words is "seventy-two million, one hundred twenty-eight thousand, eight hundred fifty-three".