79821470 has 32 divisors (see below), whose sum is σ = 152150400. Its totient is φ = 30066336.

The previous prime is 79821461. The next prime is 79821473. The reversal of 79821470 is 7412897.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79821473) 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, 32837 + ... + 35183.

It is an arithmetic number, because the mean of its divisors is an integer number (4754700).

Almost surely, 2^79821470 is an apocalyptic number.

79821470 is a deficient number, since it is larger than the sum of its proper divisors (72328930).

79821470 is a wasteful number, since it uses less digits than its factorization.

79821470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 79821470 is about 8934.2862054000. The cubic root of 79821470 is about 430.5661732580.

The spelling of 79821470 in words is "seventy-nine million, eight hundred twenty-one thousand, four hundred seventy".