1375801988 has 24 divisors (see below), whose sum is σ = 2630951904. Its totient is φ = 624312000.

The previous prime is 1375801981. The next prime is 1375802009. The reversal of 1375801988 is 8891085731.

It is a super-5 number, since 5×1375801988⁵ (a number of 47 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1375801981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431 + ... + 52457.

It is an arithmetic number, because the mean of its divisors is an integer number (109622996).

Almost surely, 2^1375801988 is an apocalyptic number.

It is an amenable number.

1375801988 is a deficient number, since it is larger than the sum of its proper divisors (1255149916).

1375801988 is a wasteful number, since it uses less digits than its factorization.

1375801988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52643 (or 52641 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 50.

The square root of 1375801988 is about 37091.8048630691. The cubic root of 1375801988 is about 1112.2061978527.

The spelling of 1375801988 in words is "one billion, three hundred seventy-five million, eight hundred one thousand, nine hundred eighty-eight".