1642380 has 48 divisors (see below), whose sum is σ = 4752384. Its totient is φ = 423360.

The previous prime is 1642373. The next prime is 1642397. The reversal of 1642380 is 832461.

1642380 = 215² + 216² + ... + 245².

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1642380.

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, 1419 + ... + 2301.

It is an arithmetic number, because the mean of its divisors is an integer number (99008).

2^1642380 is an apocalyptic number.

1642380 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 1642380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2376192).

1642380 is an abundant number, since it is smaller than the sum of its proper divisors (3110004).

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

1642380 is a wasteful number, since it uses less digits than its factorization.

1642380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 924 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1642380 is about 1281.5537444836. The cubic root of 1642380 is about 117.9843893933.

The spelling of 1642380 in words is "one million, six hundred forty-two thousand, three hundred eighty".