7819812 has 216 divisors, whose sum is σ = 27885312. Its totient is φ = 1814400.

The previous prime is 7819789. The next prime is 7819831. The reversal of 7819812 is 2189187.

7819812 = 39² + 40² + ... + 286².

It is a super-2 number, since 2×7819812² = 122298919430688, which contains 22 as substring.

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

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 252237 + ... + 252267.

Almost surely, 2^7819812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7819812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13942656).

7819812 is an abundant number, since it is smaller than the sum of its proper divisors (20065500).

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

7819812 is a wasteful number, since it uses less digits than its factorization.

7819812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79 (or 67 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 7819812 is about 2796.3926762885. The cubic root of 7819812 is about 198.4870166012.

It can be divided in two parts, 78198 and 12, that added together give a triangular number (78210 = T₃₉₅).

The spelling of 7819812 in words is "seven million, eight hundred nineteen thousand, eight hundred twelve".