72288552 has 32 divisors (see below), whose sum is σ = 206539200. Its totient is φ = 20653824.

The previous prime is 72288533. The next prime is 72288553. The reversal of 72288552 is 25588227.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 72288552.

It is not an unprimeable number, because it can be changed into a prime (72288553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214977 + ... + 215312.

It is an arithmetic number, because the mean of its divisors is an integer number (6454350).

Almost surely, 2^72288552 is an apocalyptic number.

It is an amenable number.

72288552 is an abundant number, since it is smaller than the sum of its proper divisors (134250648).

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

72288552 is a wasteful number, since it uses less digits than its factorization.

72288552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430305 (or 430301 counting only the distinct ones).

The product of its digits is 89600, while the sum is 39.

The square root of 72288552 is about 8502.2674622715. The cubic root of 72288552 is about 416.5717760092.

The spelling of 72288552 in words is "seventy-two million, two hundred eighty-eight thousand, five hundred fifty-two".