1008491378 has 4 divisors (see below), whose sum is σ = 1512737070. Its totient is φ = 504245688.

The previous prime is 1008491377. The next prime is 1008491381. The reversal of 1008491378 is 8731948001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1007872009 + 619369 = 31747^2 + 787^2 .

It is not an unprimeable number, because it can be changed into a prime (1008491377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252122843 + ... + 252122846.

Almost surely, 2^1008491378 is an apocalyptic number.

1008491378 is a deficient number, since it is larger than the sum of its proper divisors (504245692).

1008491378 is an equidigital number, since it uses as much as digits as its factorization.

1008491378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504245691.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1008491378 is about 31756.7532660378. The cubic root of 1008491378 is about 1002.8224854144.

The spelling of 1008491378 in words is "one billion, eight million, four hundred ninety-one thousand, three hundred seventy-eight".