3420489780 has 144 divisors (see below), whose sum is σ = 10972136448. Its totient is φ = 861120000.

The previous prime is 3420489733. The next prime is 3420489803. The reversal of 3420489780 is 879840243.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 221305 + ... + 236255.

It is an arithmetic number, because the mean of its divisors is an integer number (76195392).

Almost surely, 2^3420489780 is an apocalyptic number.

3420489780 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 3420489780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5486068224).

3420489780 is an abundant number, since it is smaller than the sum of its proper divisors (7551646668).

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

3420489780 is a wasteful number, since it uses less digits than its factorization.

3420489780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15038 (or 15033 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 3420489780 is about 58484.9534495839. The cubic root of 3420489780 is about 1506.7091732554.

The spelling of 3420489780 in words is "three billion, four hundred twenty million, four hundred eighty-nine thousand, seven hundred eighty".