1648387 has 16 divisors (see below), whose sum is σ = 1915200. Its totient is φ = 1406592.

The previous prime is 1648379. The next prime is 1648391. The reversal of 1648387 is 7838461.

It is a happy number.

It is not a de Polignac number, because 1648387 - 2³ = 1648379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1648187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10989 + ... + 11137.

It is an arithmetic number, because the mean of its divisors is an integer number (119700).

2^1648387 is an apocalyptic number.

1648387 is a deficient number, since it is larger than the sum of its proper divisors (266813).

1648387 is a wasteful number, since it uses less digits than its factorization.

1648387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222.

The product of its digits is 32256, while the sum is 37.

The square root of 1648387 is about 1283.8952449480. The cubic root of 1648387 is about 118.1280568995.

1648387 divided by its sum of digits (37) gives a triangular number (44551 = T₂₉₈).

The spelling of 1648387 in words is "one million, six hundred forty-eight thousand, three hundred eighty-seven".