7123816 has 48 divisors (see below), whose sum is σ = 16467300. Its totient is φ = 2870784.

The previous prime is 7123793. The next prime is 7123847. The reversal of 7123816 is 6183217.

It can be written as a sum of positive squares in 2 ways, for example, as 7001316 + 122500 = 2646^2 + 350^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6130 + ... + 7198.

Almost surely, 2^7123816 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 7123816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8233650).

7123816 is an abundant number, since it is smaller than the sum of its proper divisors (9343484).

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

7123816 is a wasteful number, since it uses less digits than its factorization.

7123816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106 (or 1095 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 7123816 is about 2669.0477702731. The cubic root of 7123816 is about 192.4143972007.

The spelling of 7123816 in words is "seven million, one hundred twenty-three thousand, eight hundred sixteen".