1387743700 has 72 divisors (see below), whose sum is σ = 3511928000. Its totient is φ = 475786080.

The previous prime is 1387743697. The next prime is 1387743703. The reversal of 1387743700 is 73477831.

It is an interprime number because it is at equal distance from previous prime (1387743697) and next prime (1387743703).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387743703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14071 + ... + 54529.

Almost surely, 2^1387743700 is an apocalyptic number.

1387743700 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 1387743700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1755964000).

1387743700 is an abundant number, since it is smaller than the sum of its proper divisors (2124184300).

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

1387743700 is a wasteful number, since it uses less digits than its factorization.

1387743700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40494 (or 40473 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 1387743700 is about 37252.4321353653. The cubic root of 1387743700 is about 1115.4148482796.

The spelling of 1387743700 in words is "one billion, three hundred eighty-seven million, seven hundred forty-three thousand, seven hundred".