1375988 has 6 divisors (see below), whose sum is σ = 2407986. Its totient is φ = 687992.

The previous prime is 1375987. The next prime is 1376003. The reversal of 1375988 is 8895731.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1304164 + 71824 = 1142^2 + 268^2 .

It is a super-2 number, since 2×1375988² = 3786685952288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171995 + ... + 172002.

It is an arithmetic number, because the mean of its divisors is an integer number (401331).

2^1375988 is an apocalyptic number.

It is an amenable number.

1375988 is a deficient number, since it is larger than the sum of its proper divisors (1031998).

1375988 is a wasteful number, since it uses less digits than its factorization.

1375988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344001 (or 343999 counting only the distinct ones).

The product of its digits is 60480, while the sum is 41.

The square root of 1375988 is about 1173.0251489205. The cubic root of 1375988 is about 111.2256319982.

The spelling of 1375988 in words is "one million, three hundred seventy-five thousand, nine hundred eighty-eight".