1388520707 has 8 divisors (see below), whose sum is σ = 1589703936. Its totient is φ = 1188043272.

The previous prime is 1388520677. The next prime is 1388520733. The reversal of 1388520707 is 7070258831.

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

It is a cyclic number.

It is not a de Polignac number, because 1388520707 - 2⁶ = 1388520643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388520307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172223 + ... + 180104.

It is an arithmetic number, because the mean of its divisors is an integer number (198712992).

Almost surely, 2^1388520707 is an apocalyptic number.

1388520707 is a deficient number, since it is larger than the sum of its proper divisors (201183229).

1388520707 is an equidigital number, since it uses as much as digits as its factorization.

1388520707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352897.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 1388520707 is about 37262.8596191972. The cubic root of 1388520707 is about 1115.6229855221.

The spelling of 1388520707 in words is "one billion, three hundred eighty-eight million, five hundred twenty thousand, seven hundred seven".