72169240 has 192 divisors, whose sum is σ = 203777280. Its totient is φ = 22809600.

The previous prime is 72169231. The next prime is 72169241. The reversal of 72169240 is 4296127.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72169241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1950502 + ... + 1950538.

It is an arithmetic number, because the mean of its divisors is an integer number (1061340).

Almost surely, 2^72169240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72169240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101888640).

72169240 is an abundant number, since it is smaller than the sum of its proper divisors (131608040).

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

72169240 is a wasteful number, since it uses less digits than its factorization.

72169240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 72169240 is about 8495.2480834876. The cubic root of 72169240 is about 416.3424663892.

The spelling of 72169240 in words is "seventy-two million, one hundred sixty-nine thousand, two hundred forty".