1388199412 has 6 divisors (see below), whose sum is σ = 2429348978. Its totient is φ = 694099704.

The previous prime is 1388199391. The next prime is 1388199427. The reversal of 1388199412 is 2149918831.

It can be written as a sum of positive squares in only one way, i.e., 1046910736 + 341288676 = 32356^2 + 18474^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173524923 + ... + 173524930.

Almost surely, 2^1388199412 is an apocalyptic number.

It is an amenable number.

1388199412 is a deficient number, since it is larger than the sum of its proper divisors (1041149566).

1388199412 is a wasteful number, since it uses less digits than its factorization.

1388199412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347049857 (or 347049855 counting only the distinct ones).

The product of its digits is 124416, while the sum is 46.

The square root of 1388199412 is about 37258.5481735400. The cubic root of 1388199412 is about 1115.5369294923.

It can be divided in two parts, 1388199 and 412, that added together give a triangular number (1388611 = T₁₆₆₆).

The spelling of 1388199412 in words is "one billion, three hundred eighty-eight million, one hundred ninety-nine thousand, four hundred twelve".