1388949350 has 12 divisors (see below), whose sum is σ = 2583445884. Its totient is φ = 555579720.

The previous prime is 1388949313. The next prime is 1388949379. The reversal of 1388949350 is 539498831.

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 27778987 = 1388949350 / (1 + 3 + 8 + 8 + 9 + 4 + 9 + 3 + 5 + 0).

It is a Curzon number.

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 5 ways as a sum of consecutive naturals, for example, 13889444 + ... + 13889543.

It is an arithmetic number, because the mean of its divisors is an integer number (215287157).

Almost surely, 2^1388949350 is an apocalyptic number.

1388949350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388949350 is a deficient number, since it is larger than the sum of its proper divisors (1194496534).

1388949350 is a wasteful number, since it uses less digits than its factorization.

1388949350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27778999 (or 27778994 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 1388949350 is about 37268.6107870954. The cubic root of 1388949350 is about 1115.7377730994.

The spelling of 1388949350 in words is "one billion, three hundred eighty-eight million, nine hundred forty-nine thousand, three hundred fifty".