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72028885 = 516388379
BaseRepresentation
bin1000100101100…
…01001011010101
312000112110001111
410102301023111
5121414411020
611051455021
71533143515
oct422611325
9160473044
1072028885
1137727405
1220157471
1311bcc156
1497cd845
1564cbd5a
hex44b12d5

72028885 has 8 divisors (see below), whose sum is σ = 86965920. Its totient is φ = 57268944.

The previous prime is 72028849. The next prime is 72028897. The reversal of 72028885 is 58882027.

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 72028885 - 27 = 72028757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43375 + ... + 45004.

It is an arithmetic number, because the mean of its divisors is an integer number (10870740).

Almost surely, 272028885 is an apocalyptic number.

It is an amenable number.

72028885 is a deficient number, since it is larger than the sum of its proper divisors (14937035).

72028885 is a wasteful number, since it uses less digits than its factorization.

72028885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88547.

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 72028885 is about 8486.9832685118. The cubic root of 72028885 is about 416.0723897847.

The spelling of 72028885 in words is "seventy-two million, twenty-eight thousand, eight hundred eighty-five".

Divisors: 1 5 163 815 88379 441895 14405777 72028885