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72228552 = 23311416673
BaseRepresentation
bin1000100111000…
…01111011001000
312000220120221120
410103201323020
5121442303202
611100035240
71534634604
oct423417310
9160816846
1072228552
1137853420
1220232b20
1311c6bcb6
149842504
15651b0bc
hex44e1ec8

72228552 has 64 divisors (see below), whose sum is σ = 201821760. Its totient is φ = 21350400.

The previous prime is 72228547. The next prime is 72228587. The reversal of 72228552 is 25582227.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7488 + ... + 14160.

It is an arithmetic number, because the mean of its divisors is an integer number (3153465).

Almost surely, 272228552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72228552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100910880).

72228552 is an abundant number, since it is smaller than the sum of its proper divisors (129593208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72228552 is a wasteful number, since it uses less digits than its factorization.

72228552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6734 (or 6730 counting only the distinct ones).

The product of its digits is 22400, while the sum is 33.

The square root of 72228552 is about 8498.7382592947. The cubic root of 72228552 is about 416.4564916191.

The spelling of 72228552 in words is "seventy-two million, two hundred twenty-eight thousand, five hundred fifty-two".