1375694538 has 64 divisors (see below), whose sum is σ = 2934662400. Its totient is φ = 429017600.

The previous prime is 1375694531. The next prime is 1375694557. The reversal of 1375694538 is 8354965731.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1375694531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1239928 + ... + 1241036.

It is an arithmetic number, because the mean of its divisors is an integer number (45854100).

Almost surely, 2^1375694538 is an apocalyptic number.

1375694538 is an abundant number, since it is smaller than the sum of its proper divisors (1558967862).

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

1375694538 is a wasteful number, since it uses less digits than its factorization.

1375694538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327.

The product of its digits is 2721600, while the sum is 51.

The square root of 1375694538 is about 37090.3564016309. The cubic root of 1375694538 is about 1112.1772427006.

The spelling of 1375694538 in words is "one billion, three hundred seventy-five million, six hundred ninety-four thousand, five hundred thirty-eight".