8423778402 has 48 divisors (see below), whose sum is σ = 20689992960. Its totient is φ = 2455513056.

The previous prime is 8423778371. The next prime is 8423778413. The reversal of 8423778402 is 2048773248.

8423778402 is a `hidden beast` number, since 8 + 4 + 237 + 7 + 8 + 402 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 942898 + ... + 951789.

It is an arithmetic number, because the mean of its divisors is an integer number (431041520).

Almost surely, 2^8423778402 is an apocalyptic number.

8423778402 is an abundant number, since it is smaller than the sum of its proper divisors (12266214558).

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

8423778402 is a wasteful number, since it uses less digits than its factorization.

8423778402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894727 (or 1894724 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 45.

The square root of 8423778402 is about 91781.1440438612. The cubic root of 8423778402 is about 2034.7090241119.

The spelling of 8423778402 in words is "eight billion, four hundred twenty-three million, seven hundred seventy-eight thousand, four hundred two".