79621272 has 64 divisors (see below), whose sum is σ = 222345600. Its totient is φ = 26399520.

The previous prime is 79621271. The next prime is 79621273. The reversal of 79621272 is 27212697.

79621272 is a `hidden beast` number, since 7 + 9 + 621 + 27 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (79621271) and next prime (79621273).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79621271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44703 + ... + 46449.

It is an arithmetic number, because the mean of its divisors is an integer number (3474150).

Almost surely, 2^79621272 is an apocalyptic number.

79621272 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 79621272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111172800).

79621272 is an abundant number, since it is smaller than the sum of its proper divisors (142724328).

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

79621272 is a wasteful number, since it uses less digits than its factorization.

79621272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973 (or 1963 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 79621272 is about 8923.0752546418. The cubic root of 79621272 is about 430.2059082343.

The spelling of 79621272 in words is "seventy-nine million, six hundred twenty-one thousand, two hundred seventy-two".