3129548220 has 72 divisors (see below), whose sum is σ = 9509900400. Its totient is φ = 833057280.

The previous prime is 3129548203. The next prime is 3129548333. The reversal of 3129548220 is 228459213.

It is a happy number.

It is a super-2 number, since 2×3129548220² = 19588144122610336800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87556 + ... + 118004.

It is an arithmetic number, because the mean of its divisors is an integer number (132081950).

Almost surely, 2^3129548220 is an apocalyptic number.

3129548220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3129548220 is an abundant number, since it is smaller than the sum of its proper divisors (6380352180).

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

3129548220 is a wasteful number, since it uses less digits than its factorization.

3129548220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31035 (or 31030 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 3129548220 is about 55942.3651627280. The cubic root of 3129548220 is about 1462.7178093309.

The spelling of 3129548220 in words is "three billion, one hundred twenty-nine million, five hundred forty-eight thousand, two hundred twenty".