72454550 has 24 divisors (see below), whose sum is σ = 154018416. Its totient is φ = 24841440.

The previous prime is 72454549. The next prime is 72454553. The reversal of 72454550 is 5545427.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72454553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103157 + ... + 103856.

It is an arithmetic number, because the mean of its divisors is an integer number (6417434).

Almost surely, 2^72454550 is an apocalyptic number.

72454550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72454550 is an abundant number, since it is smaller than the sum of its proper divisors (81563866).

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

72454550 is a wasteful number, since it uses less digits than its factorization.

72454550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207032 (or 207027 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 32.

The square root of 72454550 is about 8512.0238486508. The cubic root of 72454550 is about 416.8903936273.

Adding to 72454550 its reverse (5545427), we get a palindrome (77999977).

The spelling of 72454550 in words is "seventy-two million, four hundred fifty-four thousand, five hundred fifty".