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72740449 = 499914551
BaseRepresentation
bin1000101010111…
…10111001100001
312001212121010201
410111132321201
5122110143244
611115025201
71542166165
oct425367141
9161777121
1072740449
1138072a81
122043b201
13120bacb2
149936ca5
1565bcad4
hex455ee61

72740449 has 4 divisors (see below), whose sum is σ = 72760000. Its totient is φ = 72720900.

The previous prime is 72740441. The next prime is 72740489. The reversal of 72740449 is 94404727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72740449 - 23 = 72740441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72740441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2277 + ... + 12274.

It is an arithmetic number, because the mean of its divisors is an integer number (18190000).

Almost surely, 272740449 is an apocalyptic number.

It is an amenable number.

72740449 is a deficient number, since it is larger than the sum of its proper divisors (19551).

72740449 is a wasteful number, since it uses less digits than its factorization.

72740449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19550.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 72740449 is about 8528.8011467029. The cubic root of 72740449 is about 417.4380110435.

The spelling of 72740449 in words is "seventy-two million, seven hundred forty thousand, four hundred forty-nine".

Divisors: 1 4999 14551 72740449