3445631220 has 24 divisors (see below), whose sum is σ = 9647767584. Its totient is φ = 918834976.

The previous prime is 3445631191. The next prime is 3445631239. The reversal of 3445631220 is 221365443.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28713534 + ... + 28713653.

It is an arithmetic number, because the mean of its divisors is an integer number (401990316).

Almost surely, 2^3445631220 is an apocalyptic number.

3445631220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3445631220 is an abundant number, since it is smaller than the sum of its proper divisors (6202136364).

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

3445631220 is a wasteful number, since it uses less digits than its factorization.

3445631220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57427199 (or 57427197 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 3445631220 is about 58699.4993164337. The cubic root of 3445631220 is about 1510.3917262129.

Adding to 3445631220 its reverse (221365443), we get a palindrome (3666996663).

The spelling of 3445631220 in words is "three billion, four hundred forty-five million, six hundred thirty-one thousand, two hundred twenty".