1652640 has 96 divisors (see below), whose sum is σ = 5697216. Its totient is φ = 399360.

The previous prime is 1652627. The next prime is 1652671. The reversal of 1652640 is 462561.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1652640.

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, 5124 + ... + 5436.

It is an arithmetic number, because the mean of its divisors is an integer number (59346).

2^1652640 is an apocalyptic number.

1652640 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 1652640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2848608).

1652640 is an abundant number, since it is smaller than the sum of its proper divisors (4044576).

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

1652640 is a wasteful number, since it uses less digits than its factorization.

1652640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1652640 is about 1285.5504657539. The cubic root of 1652640 is about 118.2295636381.

It can be divided in two parts, 165 and 2640, that multiplied together give a square (435600 = 660²).

The spelling of 1652640 in words is "one million, six hundred fifty-two thousand, six hundred forty".