1640214 has 24 divisors (see below), whose sum is σ = 3577392. Its totient is φ = 543120.

The previous prime is 1640207. The next prime is 1640231. The reversal of 1640214 is 4120461.

1640214 is a `hidden beast` number, since 1 + 640 + 21 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5119 + ... + 5429.

It is an arithmetic number, because the mean of its divisors is an integer number (149058).

2^1640214 is an apocalyptic number.

1640214 is an abundant number, since it is smaller than the sum of its proper divisors (1937178).

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

1640214 is a wasteful number, since it uses less digits than its factorization.

1640214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 609 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1640214 is about 1280.7083977237. The cubic root of 1640214 is about 117.9324999376.

Adding to 1640214 its reverse (4120461), we get a palindrome (5760675).

It can be divided in two parts, 164021 and 4, that added together give a square (164025 = 405²).

The spelling of 1640214 in words is "one million, six hundred forty thousand, two hundred fourteen".