1915000385 has 8 divisors (see below), whose sum is σ = 2314775016. Its totient is φ = 1520817280.

The previous prime is 1915000357. The next prime is 1915000387. The reversal of 1915000385 is 5830005191.

1915000385 = 30943² + 30944².

It can be written as a sum of positive squares in 4 ways, for example, as 14737921 + 1900262464 = 3839^2 + 43592^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1915000385 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1915000387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1397126 + ... + 1398495.

It is an arithmetic number, because the mean of its divisors is an integer number (289346877).

Almost surely, 2^1915000385 is an apocalyptic number.

1915000385 is the 30944-th centered square number.

It is an amenable number.

1915000385 is a deficient number, since it is larger than the sum of its proper divisors (399774631).

1915000385 is a wasteful number, since it uses less digits than its factorization.

1915000385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795763.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 1915000385 is about 43760.7173730048. The cubic root of 1915000385 is about 1241.8132475231.

The spelling of 1915000385 in words is "one billion, nine hundred fifteen million, three hundred eighty-five", and thus it is an aban number.