72621072 has 60 divisors (see below), whose sum is σ = 206129664. Its totient is φ = 23862720.

The previous prime is 72621071. The next prime is 72621083. The reversal of 72621072 is 27012627.

It is not an unprimeable number, because it can be changed into a prime (72621071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6673 + ... + 13775.

Almost surely, 2^72621072 is an apocalyptic number.

72621072 is a gapful number since it is divisible by the number (72) 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 72621072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103064832).

72621072 is an abundant number, since it is smaller than the sum of its proper divisors (133508592).

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

72621072 is a wasteful number, since it uses less digits than its factorization.

72621072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7188 (or 7179 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 72621072 is about 8521.7998098993. The cubic root of 72621072 is about 417.2095284333.

Adding to 72621072 its reverse (27012627), we get a palindrome (99633699).

The spelling of 72621072 in words is "seventy-two million, six hundred twenty-one thousand, seventy-two".