2919820340 has 48 divisors (see below), whose sum is σ = 6349024080. Its totient is φ = 1126594560.

The previous prime is 2919820291. The next prime is 2919820349. The reversal of 2919820340 is 430289192.

It can be written as a sum of positive squares in 8 ways, for example, as 393149584 + 2526670756 = 19828^2 + 50266^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2919820294 and 2919820303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2919820349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 933980 + ... + 937100.

It is an arithmetic number, because the mean of its divisors is an integer number (132271335).

Almost surely, 2^2919820340 is an apocalyptic number.

2919820340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2919820340 is an abundant number, since it is smaller than the sum of its proper divisors (3429203740).

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

2919820340 is a wasteful number, since it uses less digits than its factorization.

2919820340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4772 (or 4770 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 2919820340 is about 54035.3619401221. The cubic root of 2919820340 is about 1429.2845851737.

The spelling of 2919820340 in words is "two billion, nine hundred nineteen million, eight hundred twenty thousand, three hundred forty".