1388046730 has 32 divisors (see below), whose sum is σ = 2867293440. Its totient is φ = 473921280.

The previous prime is 1388046713. The next prime is 1388046739. The reversal of 1388046730 is 376408831.

It is not an unprimeable number, because it can be changed into a prime (1388046739) 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 15 ways as a sum of consecutive naturals, for example, 24270 + ... + 58009.

It is an arithmetic number, because the mean of its divisors is an integer number (89602920).

Almost surely, 2^1388046730 is an apocalyptic number.

1388046730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388046730 is an abundant number, since it is smaller than the sum of its proper divisors (1479246710).

1388046730 is a wasteful number, since it uses less digits than its factorization.

1388046730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82534.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 1388046730 is about 37256.4991645753. The cubic root of 1388046730 is about 1115.4960303120.

The spelling of 1388046730 in words is "one billion, three hundred eighty-eight million, forty-six thousand, seven hundred thirty".