1387650 has 72 divisors (see below), whose sum is σ = 3888144. Its totient is φ = 324800.

The previous prime is 1387649. The next prime is 1387667. The reversal of 1387650 is 567831.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 47836 + ... + 47864.

It is an arithmetic number, because the mean of its divisors is an integer number (54002).

2^1387650 is an apocalyptic number.

1387650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1387650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1944072).

1387650 is an abundant number, since it is smaller than the sum of its proper divisors (2500494).

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

1387650 is a wasteful number, since it uses less digits than its factorization.

1387650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1387650 is about 1177.9855686722. The cubic root of 1387650 is about 111.5389743566.

The spelling of 1387650 in words is "one million, three hundred eighty-seven thousand, six hundred fifty".