1493663878 has 24 divisors (see below), whose sum is σ = 2631675312. Its totient is φ = 622832544.

The previous prime is 1493663839. The next prime is 1493663881. The reversal of 1493663878 is 8783663941.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19801 + ... + 58132.

It is an arithmetic number, because the mean of its divisors is an integer number (109653138).

Almost surely, 2^1493663878 is an apocalyptic number.

1493663878 is a deficient number, since it is larger than the sum of its proper divisors (1138011434).

1493663878 is an equidigital number, since it uses as much as digits as its factorization.

1493663878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78016 (or 77979 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 55.

The square root of 1493663878 is about 38647.9479144754. The cubic root of 1493663878 is about 1143.1001790824.

The spelling of 1493663878 in words is "one billion, four hundred ninety-three million, six hundred sixty-three thousand, eight hundred seventy-eight".