1220078156 has 36 divisors (see below), whose sum is σ = 2346855000. Its totient is φ = 550417920.

The previous prime is 1220078143. The next prime is 1220078161. The reversal of 1220078156 is 6518700221.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 976220 + ... + 977468.

Almost surely, 2^1220078156 is an apocalyptic number.

It is an amenable number.

1220078156 is a deficient number, since it is larger than the sum of its proper divisors (1126776844).

1220078156 is a wasteful number, since it uses less digits than its factorization.

1220078156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562 (or 1411 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1220078156 is about 34929.6171751137. The cubic root of 1220078156 is about 1068.5525471506.

Adding to 1220078156 its reverse (6518700221), we get a palindrome (7738778377).

The spelling of 1220078156 in words is "one billion, two hundred twenty million, seventy-eight thousand, one hundred fifty-six".