1423664 has 20 divisors (see below), whose sum is σ = 3009480. Its totient is φ = 647040.

The previous prime is 1423663. The next prime is 1423691. The reversal of 1423664 is 4663241.

It is a d-powerful number, because it can be written as 1 + 4⁸ + 2¹⁷ + 3¹¹ + 6² + 6⁴ + 4¹⁰ .

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3869 + ... + 4220.

It is an arithmetic number, because the mean of its divisors is an integer number (150474).

2^1423664 is an apocalyptic number.

It is an amenable number.

1423664 is an abundant number, since it is smaller than the sum of its proper divisors (1585816).

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

1423664 is a wasteful number, since it uses less digits than its factorization.

1423664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8108 (or 8102 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 1423664 is about 1193.1739185886. The cubic root of 1423664 is about 112.4956772002.

The spelling of 1423664 in words is "one million, four hundred twenty-three thousand, six hundred sixty-four".