79800490 has 64 divisors (see below), whose sum is σ = 183990528. Its totient is φ = 24192000.

The previous prime is 79800481. The next prime is 79800491. The reversal of 79800490 is 9400897.

It is a happy number.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (79800491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27090 + ... + 29890.

It is an arithmetic number, because the mean of its divisors is an integer number (2874852).

Almost surely, 2^79800490 is an apocalyptic number.

79800490 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

79800490 is an abundant number, since it is smaller than the sum of its proper divisors (104190038).

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

79800490 is a wasteful number, since it uses less digits than its factorization.

79800490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 79800490 is about 8933.1119997457. Note that the first 3 decimals coincide. The cubic root of 79800490 is about 430.5284471097.

The spelling of 79800490 in words is "seventy-nine million, eight hundred thousand, four hundred ninety".