1608877378 has 4 divisors (see below), whose sum is σ = 2413316070. Its totient is φ = 804438688.

The previous prime is 1608877343. The next prime is 1608877397. The reversal of 1608877378 is 8737788061.

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., 1571091769 + 37785609 = 39637^2 + 6147^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402219343 + ... + 402219346.

Almost surely, 2^1608877378 is an apocalyptic number.

1608877378 is a deficient number, since it is larger than the sum of its proper divisors (804438692).

1608877378 is an equidigital number, since it uses as much as digits as its factorization.

1608877378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804438691.

The product of its (nonzero) digits is 3161088, while the sum is 55.

The square root of 1608877378 is about 40110.8137289684. The cubic root of 1608877378 is about 1171.7662411830.

The spelling of 1608877378 in words is "one billion, six hundred eight million, eight hundred seventy-seven thousand, three hundred seventy-eight".