1387975500 has 240 divisors, whose sum is σ = 4639418784. Its totient is φ = 361065600.

The previous prime is 1387975483. The next prime is 1387975553. The reversal of 1387975500 is 55797831.

1387975500 is a `hidden beast` number, since 1 + 3 + 8 + 7 + 97 + 550 + 0 = 666.

1387975500 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1741102 + ... + 1741898.

Almost surely, 2^1387975500 is an apocalyptic number.

1387975500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1387975500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2319709392).

1387975500 is an abundant number, since it is smaller than the sum of its proper divisors (3251443284).

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

1387975500 is a wasteful number, since it uses less digits than its factorization.

1387975500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 45.

The square root of 1387975500 is about 37255.5432117155. The cubic root of 1387975500 is about 1115.4769487879.

The spelling of 1387975500 in words is "one billion, three hundred eighty-seven million, nine hundred seventy-five thousand, five hundred".