1622340 has 36 divisors (see below), whose sum is σ = 4921644. Its totient is φ = 432576.

The previous prime is 1622333. The next prime is 1622359. The reversal of 1622340 is 432261.

It is a happy number.

1622340 is a `hidden beast` number, since 1 + 622 + 3 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 665856 + 956484 = 816^2 + 978^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4327 + ... + 4686.

2^1622340 is an apocalyptic number.

1622340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1622340 is an abundant number, since it is smaller than the sum of its proper divisors (3299304).

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

1622340 is a wasteful number, since it uses less digits than its factorization.

1622340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9028 (or 9023 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1622340 is about 1273.7111132435. The cubic root of 1622340 is about 117.5025501182.

The spelling of 1622340 in words is "one million, six hundred twenty-two thousand, three hundred forty".