1220164435 has 24 divisors (see below), whose sum is σ = 1705105296. Its totient is φ = 835773120.

The previous prime is 1220164417. The next prime is 1220164447. The reversal of 1220164435 is 5344610221.

It is a de Polignac number, because none of the positive numbers 2^k-1220164435 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284769 + ... + 289021.

It is an arithmetic number, because the mean of its divisors is an integer number (71046054).

Almost surely, 2^1220164435 is an apocalyptic number.

1220164435 is a deficient number, since it is larger than the sum of its proper divisors (484940861).

1220164435 is a wasteful number, since it uses less digits than its factorization.

1220164435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5443 (or 5436 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1220164435 is about 34930.8521940132. The cubic root of 1220164435 is about 1068.5777344639.

Adding to 1220164435 its reverse (5344610221), we get a palindrome (6564774656).

It can be divided in two parts, 12201 and 64435, that added together give a triangular number (76636 = T₃₉₁).

The spelling of 1220164435 in words is "one billion, two hundred twenty million, one hundred sixty-four thousand, four hundred thirty-five".