1878355225 has 12 divisors (see below), whose sum is σ = 2330278060. Its totient is φ = 1501963200.

The previous prime is 1878355223. The next prime is 1878355231. The reversal of 1878355225 is 5225538781.

It can be written as a sum of positive squares in 6 ways, for example, as 8311689 + 1870043536 = 2883^2 + 43244^2 .

It is not a de Polignac number, because 1878355225 - 2¹ = 1878355223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1878355223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38611 + ... + 72439.

Almost surely, 2^1878355225 is an apocalyptic number.

It is an amenable number.

1878355225 is a deficient number, since it is larger than the sum of its proper divisors (451922835).

1878355225 is a wasteful number, since it uses less digits than its factorization.

1878355225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36060 (or 36055 counting only the distinct ones).

The product of its digits is 672000, while the sum is 46.

The square root of 1878355225 is about 43339.9956737423. The cubic root of 1878355225 is about 1233.8411274390.

The spelling of 1878355225 in words is "one billion, eight hundred seventy-eight million, three hundred fifty-five thousand, two hundred twenty-five".