1602640 has 80 divisors (see below), whose sum is σ = 4249728. Its totient is φ = 557568.

The previous prime is 1602637. The next prime is 1602661. The reversal of 1602640 is 462061.

It is a tau number, because it is divible by the number of its divisors (80).

1602640 is a modest number, since divided by 2640 gives 160 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23887 + ... + 23953.

2^1602640 is an apocalyptic number.

1602640 is a gapful number since it is divisible by the number (10) 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 1602640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2124864).

1602640 is an abundant number, since it is smaller than the sum of its proper divisors (2647088).

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

1602640 is a wasteful number, since it uses less digits than its factorization.

1602640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1602640 is about 1265.9541855849. The cubic root of 1602640 is about 117.0250025705.

The spelling of 1602640 in words is "one million, six hundred two thousand, six hundred forty".