1388637674 has 4 divisors (see below), whose sum is σ = 2082956514. Its totient is φ = 694318836.

The previous prime is 1388637647. The next prime is 1388637689. The reversal of 1388637674 is 4767368831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4767368831 = 19 ⋅250914149.

It can be written as a sum of positive squares in only one way, i.e., 908721025 + 479916649 = 30145^2 + 21907^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347159417 + ... + 347159420.

Almost surely, 2^1388637674 is an apocalyptic number.

1388637674 is a deficient number, since it is larger than the sum of its proper divisors (694318840).

1388637674 is an equidigital number, since it uses as much as digits as its factorization.

1388637674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694318839.

The product of its digits is 4064256, while the sum is 53.

The square root of 1388637674 is about 37264.4290711665. The cubic root of 1388637674 is about 1115.6543108045.

The spelling of 1388637674 in words is "one billion, three hundred eighty-eight million, six hundred thirty-seven thousand, six hundred seventy-four".