72354240 has 336 divisors, whose sum is σ = 295119552. Its totient is φ = 15925248.

The previous prime is 72354199. The next prime is 72354263. The reversal of 72354240 is 4245327.

72354240 is a `hidden beast` number, since 7 + 235 + 424 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 745872 + ... + 745968.

It is an arithmetic number, because the mean of its divisors is an integer number (878332).

Almost surely, 2^72354240 is an apocalyptic number.

72354240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72354240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147559776).

72354240 is an abundant number, since it is smaller than the sum of its proper divisors (222765312).

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

72354240 is a wasteful number, since it uses less digits than its factorization.

72354240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 72354240 is about 8506.1295546212. The cubic root of 72354240 is about 416.6979162340.

Adding to 72354240 its reverse (4245327), we get a palindrome (76599567).

The spelling of 72354240 in words is "seventy-two million, three hundred fifty-four thousand, two hundred forty".