1378587668 has 12 divisors (see below), whose sum is σ = 2437400532. Its totient is φ = 682187520.

The previous prime is 1378587601. The next prime is 1378587671. The reversal of 1378587668 is 8667858731.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 356378884 + 1022208784 = 18878^2 + 31972^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776143 + ... + 1776918.

It is an arithmetic number, because the mean of its divisors is an integer number (203116711).

Almost surely, 2^1378587668 is an apocalyptic number.

It is an amenable number.

1378587668 is a deficient number, since it is larger than the sum of its proper divisors (1058812864).

1378587668 is a wasteful number, since it uses less digits than its factorization.

1378587668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3553162 (or 3553160 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 59.

The square root of 1378587668 is about 37129.3370261307. The cubic root of 1378587668 is about 1112.9563450051.

The spelling of 1378587668 in words is "one billion, three hundred seventy-eight million, five hundred eighty-seven thousand, six hundred sixty-eight".