1220536849 has 8 divisors (see below), whose sum is σ = 1401910400. Its totient is φ = 1040916096.

The previous prime is 1220536817. The next prime is 1220536873. The reversal of 1220536849 is 9486350221.

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 1220536849 - 2⁵ = 1220536817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220536049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436704 + ... + 439489.

It is an arithmetic number, because the mean of its divisors is an integer number (175238800).

Almost surely, 2^1220536849 is an apocalyptic number.

It is an amenable number.

1220536849 is a deficient number, since it is larger than the sum of its proper divisors (181373551).

1220536849 is an equidigital number, since it uses as much as digits as its factorization.

1220536849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876399.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 1220536849 is about 34936.1825189874. The cubic root of 1220536849 is about 1068.6864391642.

The spelling of 1220536849 in words is "one billion, two hundred twenty million, five hundred thirty-six thousand, eight hundred forty-nine".