79953820 has 24 divisors (see below), whose sum is σ = 168979104. Its totient is φ = 31776576.

The previous prime is 79953803. The next prime is 79953821. The reversal of 79953820 is 2835997.

It is a happy number.

It is a super-3 number, since 3×79953820³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79953821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9592 + ... + 15871.

It is an arithmetic number, because the mean of its divisors is an integer number (7040796).

Almost surely, 2^79953820 is an apocalyptic number.

It is an amenable number.

79953820 is an abundant number, since it is smaller than the sum of its proper divisors (89025284).

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

79953820 is a wasteful number, since it uses less digits than its factorization.

79953820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25629 (or 25627 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 79953820 is about 8941.6899968630. The cubic root of 79953820 is about 430.8040122197.

The spelling of 79953820 in words is "seventy-nine million, nine hundred fifty-three thousand, eight hundred twenty".