1375391730 has 16 divisors (see below), whose sum is σ = 3300940224. Its totient is φ = 366771120.

The previous prime is 1375391723. The next prime is 1375391761. The reversal of 1375391730 is 371935731.

1375391730 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22923166 + ... + 22923225.

It is an arithmetic number, because the mean of its divisors is an integer number (206308764).

Almost surely, 2^1375391730 is an apocalyptic number.

1375391730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1375391730 is an abundant number, since it is smaller than the sum of its proper divisors (1925548494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1375391730 is a wasteful number, since it uses less digits than its factorization.

1375391730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45846401.

The product of its (nonzero) digits is 59535, while the sum is 39.

The square root of 1375391730 is about 37086.2741455650. The cubic root of 1375391730 is about 1112.0956352241.

The spelling of 1375391730 in words is "one billion, three hundred seventy-five million, three hundred ninety-one thousand, seven hundred thirty".