7220536628 has 6 divisors (see below), whose sum is σ = 12635939106. Its totient is φ = 3610268312.

The previous prime is 7220536619. The next prime is 7220536663. The reversal of 7220536628 is 8266350227.

It can be written as a sum of positive squares in only one way, i.e., 5513359504 + 1707177124 = 74252^2 + 41318^2 .

It is a super-2 number, since 2×7220536628² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902567075 + ... + 902567082.

It is an arithmetic number, because the mean of its divisors is an integer number (2105989851).

Almost surely, 2^7220536628 is an apocalyptic number.

It is an amenable number.

7220536628 is a deficient number, since it is larger than the sum of its proper divisors (5415402478).

7220536628 is a wasteful number, since it uses less digits than its factorization.

7220536628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805134161 (or 1805134159 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 7220536628 is about 84973.7408144422. The cubic root of 7220536628 is about 1932.8129427650.

The spelling of 7220536628 in words is "seven billion, two hundred twenty million, five hundred thirty-six thousand, six hundred twenty-eight".