7220290 has 32 divisors (see below), whose sum is σ = 16205184. Its totient is φ = 2250240.

The previous prime is 7220263. The next prime is 7220299. The reversal of 7220290 is 920227.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (7220299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3919 + ... + 5458.

It is an arithmetic number, because the mean of its divisors is an integer number (506412).

Almost surely, 2^7220290 is an apocalyptic number.

7220290 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

7220290 is an abundant number, since it is smaller than the sum of its proper divisors (8984894).

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

7220290 is a wasteful number, since it uses less digits than its factorization.

7220290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9402.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 7220290 is about 2687.0597313793. The cubic root of 7220290 is about 193.2790936496.

The spelling of 7220290 in words is "seven million, two hundred twenty thousand, two hundred ninety".