1878034465 has 4 divisors (see below), whose sum is σ = 2253641364. Its totient is φ = 1502427568.

The previous prime is 1878034463. The next prime is 1878034469. The reversal of 1878034465 is 5644308781.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5644308781 = 46919 ⋅120299.

It can be written as a sum of positive squares in 2 ways, for example, as 1459545616 + 418488849 = 38204^2 + 20457^2 .

It is a cyclic number.

It is not a de Polignac number, because 1878034465 - 2¹ = 1878034463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1878034463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187803442 + ... + 187803451.

It is an arithmetic number, because the mean of its divisors is an integer number (563410341).

Almost surely, 2^1878034465 is an apocalyptic number.

It is an amenable number.

1878034465 is a deficient number, since it is larger than the sum of its proper divisors (375606899).

1878034465 is an equidigital number, since it uses as much as digits as its factorization.

1878034465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375606898.

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 1878034465 is about 43336.2950077646. The cubic root of 1878034465 is about 1233.7708905629.

The spelling of 1878034465 in words is "one billion, eight hundred seventy-eight million, thirty-four thousand, four hundred sixty-five".