1591408 has 40 divisors (see below), whose sum is σ = 3798368. Its totient is φ = 628992.

The previous prime is 1591397. The next prime is 1591417. The reversal of 1591408 is 8041951.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

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 7 ways as a sum of consecutive naturals, for example, 910 + ... + 2002.

2^1591408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1591408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1899184).

1591408 is an abundant number, since it is smaller than the sum of its proper divisors (2206960).

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

1591408 is a wasteful number, since it uses less digits than its factorization.

1591408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121 (or 1115 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1591408 is about 1261.5102060626. The cubic root of 1591408 is about 116.7509739826.

The spelling of 1591408 in words is "one million, five hundred ninety-one thousand, four hundred eight".