3494091780 has 144 divisors (see below), whose sum is σ = 10834662384. Its totient is φ = 911139840.

The previous prime is 3494091751. The next prime is 3494091803. The reversal of 3494091780 is 871904943.

3494091780 is a `hidden beast` number, since 3 + 494 + 0 + 91 + 78 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 401842116 + 3092249664 = 20046^2 + 55608^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5160802 + ... + 5161478.

It is an arithmetic number, because the mean of its divisors is an integer number (75240711).

Almost surely, 2^3494091780 is an apocalyptic number.

3494091780 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 3494091780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5417331192).

3494091780 is an abundant number, since it is smaller than the sum of its proper divisors (7340570604).

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

3494091780 is a wasteful number, since it uses less digits than its factorization.

3494091780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1281 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 3494091780 is about 59110.8431677302. The cubic root of 3494091780 is about 1517.4396792588.

The spelling of 3494091780 in words is "three billion, four hundred ninety-four million, ninety-one thousand, seven hundred eighty".