72204140 has 24 divisors (see below), whose sum is σ = 151906272. Its totient is φ = 28828800.

The previous prime is 72204109. The next prime is 72204149. The reversal of 72204140 is 4140227.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (72204149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9017 + ... + 15023.

It is an arithmetic number, because the mean of its divisors is an integer number (6329428).

Almost surely, 2^72204140 is an apocalyptic number.

It is an amenable number.

72204140 is an abundant number, since it is smaller than the sum of its proper divisors (79702132).

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

72204140 is a wasteful number, since it uses less digits than its factorization.

72204140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6617 (or 6615 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 72204140 is about 8497.3019247288. The cubic root of 72204140 is about 416.4095679710.

Adding to 72204140 its reverse (4140227), we get a palindrome (76344367).

The spelling of 72204140 in words is "seventy-two million, two hundred four thousand, one hundred forty".