7738220217 has 32 divisors (see below), whose sum is σ = 13108264960. Its totient is φ = 3950026560.

The previous prime is 7738220213. The next prime is 7738220251. The reversal of 7738220217 is 7120228377.

It is not a de Polignac number, because 7738220217 - 2² = 7738220213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (7738220213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 448717 + ... + 465642.

It is an arithmetic number, because the mean of its divisors is an integer number (409633280).

Almost surely, 2^7738220217 is an apocalyptic number.

It is an amenable number.

7738220217 is a deficient number, since it is larger than the sum of its proper divisors (5370044743).

7738220217 is a wasteful number, since it uses less digits than its factorization.

7738220217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914413.

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 7738220217 is about 87967.1541940513. The cubic root of 7738220217 is about 1977.9426490078.

The spelling of 7738220217 in words is "seven billion, seven hundred thirty-eight million, two hundred twenty thousand, two hundred seventeen".