72450550 has 24 divisors (see below), whose sum is σ = 135038232. Its totient is φ = 28920000.

The previous prime is 72450479. The next prime is 72450559. The reversal of 72450550 is 5505427.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72450559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28845 + ... + 31255.

It is an arithmetic number, because the mean of its divisors is an integer number (5626593).

Almost surely, 2^72450550 is an apocalyptic number.

72450550 is a deficient number, since it is larger than the sum of its proper divisors (62587682).

72450550 is a wasteful number, since it uses less digits than its factorization.

72450550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024 (or 3019 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 72450550 is about 8511.7888836601. The cubic root of 72450550 is about 416.8827217269.

Adding to 72450550 its reverse (5505427), we get a palindrome (77955977).

The spelling of 72450550 in words is "seventy-two million, four hundred fifty thousand, five hundred fifty".