72221084 has 24 divisors (see below), whose sum is σ = 136390128. Its totient is φ = 33264000.

The previous prime is 72221069. The next prime is 72221087. The reversal of 72221084 is 48012227.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72221087) 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, 30959 + ... + 33209.

It is an arithmetic number, because the mean of its divisors is an integer number (5682922).

Almost surely, 2^72221084 is an apocalyptic number.

It is an amenable number.

72221084 is a deficient number, since it is larger than the sum of its proper divisors (64169044).

72221084 is a wasteful number, since it uses less digits than its factorization.

72221084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885 (or 2883 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 72221084 is about 8498.2988886012. The cubic root of 72221084 is about 416.4421380881.

The spelling of 72221084 in words is "seventy-two million, two hundred twenty-one thousand, eighty-four".