1387241900 has 54 divisors (see below), whose sum is σ = 3286906812. Its totient is φ = 504002400.

The previous prime is 1387241897. The next prime is 1387241917. The reversal of 1387241900 is 91427831.

It is a super-2 number, since 2×1387241900² = 3848880178231220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1234739 + ... + 1235861.

Almost surely, 2^1387241900 is an apocalyptic number.

1387241900 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 1387241900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1643453406).

1387241900 is an abundant number, since it is smaller than the sum of its proper divisors (1899664912).

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

1387241900 is a wasteful number, since it uses less digits than its factorization.

1387241900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271 (or 1141 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1387241900 is about 37245.6963956911. The cubic root of 1387241900 is about 1115.2803895781.

The spelling of 1387241900 in words is "one billion, three hundred eighty-seven million, two hundred forty-one thousand, nine hundred".