810675378 has 30 divisors (see below), whose sum is σ = 1817325741. Its totient is φ = 270104328.

The previous prime is 810675377. The next prime is 810675391. The reversal of 810675378 is 873576018.

810675378 is a `hidden beast` number, since 8 + 106 + 7 + 537 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 732405969 + 78269409 = 27063^2 + 8847^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=20133.

It is not an unprimeable number, because it can be changed into a prime (810675377) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 361276 + ... + 363512.

Almost surely, 2^810675378 is an apocalyptic number.

810675378 is an abundant number, since it is smaller than the sum of its proper divisors (1006650363).

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

810675378 is an frugal number, since it uses more digits than its factorization.

810675378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4488 (or 2242 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 810675378 is about 28472.3616512575. The cubic root of 810675378 is about 932.4287608586.

The spelling of 810675378 in words is "eight hundred ten million, six hundred seventy-five thousand, three hundred seventy-eight".