1640496 has 80 divisors (see below), whose sum is σ = 4999680. Its totient is φ = 456960.

The previous prime is 1640467. The next prime is 1640497. The reversal of 1640496 is 6940461.

It is not an unprimeable number, because it can be changed into a prime (1640497) 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, 6745 + ... + 6983.

It is an arithmetic number, because the mean of its divisors is an integer number (62496).

2^1640496 is an apocalyptic number.

1640496 is a gapful number since it is divisible by the number (16) 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 1640496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2499840).

1640496 is an abundant number, since it is smaller than the sum of its proper divisors (3359184).

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

1640496 is a wasteful number, since it uses less digits than its factorization.

1640496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1640496 is about 1280.8184883113. The cubic root of 1640496 is about 117.9392582141.

The spelling of 1640496 in words is "one million, six hundred forty thousand, four hundred ninety-six".