72186240 has 256 divisors, whose sum is σ = 271434240. Its totient is φ = 15974400.

The previous prime is 72186229. The next prime is 72186253. The reversal of 72186240 is 4268127.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 72186198 and 72186207.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 550975 + ... + 551105.

It is an arithmetic number, because the mean of its divisors is an integer number (1060290).

Almost surely, 2^72186240 is an apocalyptic number.

72186240 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 72186240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135717120).

72186240 is an abundant number, since it is smaller than the sum of its proper divisors (199248000).

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

72186240 is a wasteful number, since it uses less digits than its factorization.

72186240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 72186240 is about 8496.2485839340. The cubic root of 72186240 is about 416.3751546752.

The spelling of 72186240 in words is "seventy-two million, one hundred eighty-six thousand, two hundred forty".