3499145820 has 144 divisors (see below), whose sum is σ = 10922052960. Its totient is φ = 906240000.

The previous prime is 3499145809. The next prime is 3499145827. The reversal of 3499145820 is 285419943.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3499145827) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1851436 + ... + 1853324.

It is an arithmetic number, because the mean of its divisors is an integer number (75847590).

Almost surely, 2^3499145820 is an apocalyptic number.

3499145820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3499145820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5461026480).

3499145820 is an abundant number, since it is smaller than the sum of its proper divisors (7422907140).

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

3499145820 is a wasteful number, since it uses less digits than its factorization.

3499145820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196 (or 2191 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 3499145820 is about 59153.5782518691. The cubic root of 3499145820 is about 1518.1709619091.

The spelling of 3499145820 in words is "three billion, four hundred ninety-nine million, one hundred forty-five thousand, eight hundred twenty".