1640816 has 10 divisors (see below), whose sum is σ = 3179112. Its totient is φ = 820400.

The previous prime is 1640809. The next prime is 1640819. The reversal of 1640816 is 6180461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51260 + ... + 51291.

2^1640816 is an apocalyptic number.

1640816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1640816 is a deficient number, since it is larger than the sum of its proper divisors (1538296).

1640816 is a wasteful number, since it uses less digits than its factorization.

1640816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102559 (or 102553 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1640816 is about 1280.9434023406. The cubic root of 1640816 is about 117.9469262423.

The spelling of 1640816 in words is "one million, six hundred forty thousand, eight hundred sixteen".