3549428220 has 96 divisors (see below), whose sum is σ = 10964036160. Its totient is φ = 852387840.

The previous prime is 3549428219. The next prime is 3549428231. The reversal of 3549428220 is 228249453.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23515 + ... + 87474.

It is an arithmetic number, because the mean of its divisors is an integer number (114208710).

Almost surely, 2^3549428220 is an apocalyptic number.

3549428220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3549428220 is an abundant number, since it is smaller than the sum of its proper divisors (7414607940).

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

3549428220 is a wasteful number, since it uses less digits than its factorization.

3549428220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111055 (or 111053 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 3549428220 is about 59577.0779746708. The cubic root of 3549428220 is about 1525.4083965784.

The spelling of 3549428220 in words is "three billion, five hundred forty-nine million, four hundred twenty-eight thousand, two hundred twenty".