7919220100 has 81 divisors (see below), whose sum is σ = 18912353551. Its totient is φ = 2876156800.

The previous prime is 7919220097. The next prime is 7919220107. The reversal of 7919220100 is 10229197.

The square root of 7919220100 is 88990.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 647906116 + 7271313984 = 25454^2 + 85272^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7919220107) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 9788496 + ... + 9789304.

Almost surely, 2^7919220100 is an apocalyptic number.

7919220100 is the 88990-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7919220100

7919220100 is an abundant number, since it is smaller than the sum of its proper divisors (10993133451).

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

7919220100 is a wasteful number, since it uses less digits than its factorization.

7919220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654 (or 827 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 31.

The cubic root of 7919220100 is about 1993.2455560900.

Adding to 7919220100 its reverse (10229197), we get a palindrome (7929449297).

The spelling of 7919220100 in words is "seven billion, nine hundred nineteen million, two hundred twenty thousand, one hundred".