7220836 has 48 divisors (see below), whose sum is σ = 15568000. Its totient is φ = 2921184.

The previous prime is 7220821. The next prime is 7220849. The reversal of 7220836 is 6380227.

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 15 ways as a sum of consecutive naturals, for example, 25930 + ... + 26206.

Almost surely, 2^7220836 is an apocalyptic number.

7220836 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7220836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7784000).

7220836 is an abundant number, since it is smaller than the sum of its proper divisors (8347164).

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

7220836 is a wasteful number, since it uses less digits than its factorization.

7220836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 7220836 is about 2687.1613274978. The cubic root of 7220836 is about 193.2839654634.

The spelling of 7220836 in words is "seven million, two hundred twenty thousand, eight hundred thirty-six".