72302552 has 16 divisors (see below), whose sum is σ = 154934160. Its totient is φ = 30986784.

The previous prime is 72302533. The next prime is 72302561. The reversal of 72302552 is 25520327.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645503 + ... + 645614.

It is an arithmetic number, because the mean of its divisors is an integer number (9683385).

Almost surely, 2^72302552 is an apocalyptic number.

It is an amenable number.

72302552 is an abundant number, since it is smaller than the sum of its proper divisors (82631608).

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

72302552 is a wasteful number, since it uses less digits than its factorization.

72302552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291130 (or 1291126 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 72302552 is about 8503.0907321985. The cubic root of 72302552 is about 416.5986665207.

Adding to 72302552 its reverse (25520327), we get a palindrome (97822879).

The spelling of 72302552 in words is "seventy-two million, three hundred two thousand, five hundred fifty-two".