1388158245 has 24 divisors (see below), whose sum is σ = 2451544056. Its totient is φ = 726380928.

The previous prime is 1388158237. The next prime is 1388158253. The reversal of 1388158245 is 5428518831.

It is an interprime number because it is at equal distance from previous prime (1388158237) and next prime (1388158253).

It can be written as a sum of positive squares in 4 ways, for example, as 656076996 + 732081249 = 25614^2 + 27057^2 .

It is not a de Polignac number, because 1388158245 - 2³ = 1388158237 is a prime.

It is a super-2 number, since 2×1388158245² = 3853966626322960050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1388158245.

It is a congruent number.

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 in 23 ways as a sum of consecutive naturals, for example, 288634 + ... + 293403.

It is an arithmetic number, because the mean of its divisors is an integer number (102147669).

Almost surely, 2^1388158245 is an apocalyptic number.

1388158245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1388158245 is a deficient number, since it is larger than the sum of its proper divisors (1063385811).

1388158245 is a wasteful number, since it uses less digits than its factorization.

1388158245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582101 (or 582098 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 1388158245 is about 37257.9957190400. The cubic root of 1388158245 is about 1115.5259023151.

The spelling of 1388158245 in words is "one billion, three hundred eighty-eight million, one hundred fifty-eight thousand, two hundred forty-five".