1625408 has 28 divisors (see below), whose sum is σ = 3268980. Its totient is φ = 801792.

The previous prime is 1625383. The next prime is 1625417. The reversal of 1625408 is 8045261.

It can be written as a sum of positive squares in 2 ways, for example, as 719104 + 906304 = 848^2 + 952^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6860 + ... + 7092.

2^1625408 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 1625408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1634490).

1625408 is an abundant number, since it is smaller than the sum of its proper divisors (1643572).

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

1625408 is a wasteful number, since it uses less digits than its factorization.

1625408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1625408 is about 1274.9148991207. The cubic root of 1625408 is about 117.5765729940.

It can be divided in two parts, 162 and 5408, that multiplied together give a square (876096 = 936²).

The spelling of 1625408 in words is "one million, six hundred twenty-five thousand, four hundred eight".