220744397 has 8 divisors (see below), whose sum is σ = 228532992. Its totient is φ = 212997600.

The previous prime is 220744351. The next prime is 220744399. The reversal of 220744397 is 793447022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 220744397 - 2¹² = 220740301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220744397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220744399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497 + ... + 21017.

It is an arithmetic number, because the mean of its divisors is an integer number (28566624).

Almost surely, 2^220744397 is an apocalyptic number.

It is an amenable number.

220744397 is a deficient number, since it is larger than the sum of its proper divisors (7788595).

220744397 is a wasteful number, since it uses less digits than its factorization.

220744397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20899.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 220744397 is about 14857.4694009444. The cubic root of 220744397 is about 604.3611835109.

The spelling of 220744397 in words is "two hundred twenty million, seven hundred forty-four thousand, three hundred ninety-seven".