1396673638 has 8 divisors (see below), whose sum is σ = 2095295832. Its totient is φ = 698241696.

The previous prime is 1396673599. The next prime is 1396673639. The reversal of 1396673638 is 8363766931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396673639) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 27520 + ... + 59587.

It is an arithmetic number, because the mean of its divisors is an integer number (261911979).

Almost surely, 2^1396673638 is an apocalyptic number.

1396673638 is a deficient number, since it is larger than the sum of its proper divisors (698622194).

1396673638 is an equidigital number, since it uses as much as digits as its factorization.

1396673638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95126.

The product of its digits is 2939328, while the sum is 52.

The square root of 1396673638 is about 37372.0970511423. The cubic root of 1396673638 is about 1117.8022479358.

The spelling of 1396673638 in words is "one billion, three hundred ninety-six million, six hundred seventy-three thousand, six hundred thirty-eight".