1220365896 has 32 divisors (see below), whose sum is σ = 3211490400. Its totient is φ = 385378560.

The previous prime is 1220365891. The next prime is 1220365897. The reversal of 1220365896 is 6985630221.

It is not an unprimeable number, because it can be changed into a prime (1220365891) 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, 1337665 + ... + 1338576.

It is an arithmetic number, because the mean of its divisors is an integer number (100359075).

Almost surely, 2^1220365896 is an apocalyptic number.

It is an amenable number.

1220365896 is an abundant number, since it is smaller than the sum of its proper divisors (1991124504).

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

1220365896 is a wasteful number, since it uses less digits than its factorization.

1220365896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676269 (or 2676265 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 1220365896 is about 34933.7357864858. The cubic root of 1220365896 is about 1068.6365420819.

The spelling of 1220365896 in words is "one billion, two hundred twenty million, three hundred sixty-five thousand, eight hundred ninety-six".