1915916340 has 48 divisors (see below), whose sum is σ = 5777227008. Its totient is φ = 471609984.

The previous prime is 1915916329. The next prime is 1915916341. The reversal of 1915916340 is 436195191.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1915916341) 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, 1227372 + ... + 1228931.

It is an arithmetic number, because the mean of its divisors is an integer number (120358896).

Almost surely, 2^1915916340 is an apocalyptic number.

1915916340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1915916340 is an abundant number, since it is smaller than the sum of its proper divisors (3861310668).

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

1915916340 is a wasteful number, since it uses less digits than its factorization.

1915916340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456328 (or 2456326 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 1915916340 is about 43771.1816153048. The cubic root of 1915916340 is about 1242.0112046204.

The spelling of 1915916340 in words is "one billion, nine hundred fifteen million, nine hundred sixteen thousand, three hundred forty".