1220238478 has 16 divisors (see below), whose sum is σ = 1939407840. Its totient is φ = 573820416.

The previous prime is 1220238473. The next prime is 1220238491. The reversal of 1220238478 is 8748320221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220238473) 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, 38575 + ... + 62677.

It is an arithmetic number, because the mean of its divisors is an integer number (121212990).

Almost surely, 2^1220238478 is an apocalyptic number.

1220238478 is a deficient number, since it is larger than the sum of its proper divisors (719169362).

1220238478 is a wasteful number, since it uses less digits than its factorization.

1220238478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25611.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 1220238478 is about 34931.9120289743. The cubic root of 1220238478 is about 1068.5993487913.

Adding to 1220238478 its reverse (8748320221), we get a palindrome (9968558699).

The spelling of 1220238478 in words is "one billion, two hundred twenty million, two hundred thirty-eight thousand, four hundred seventy-eight".