1553904 has 100 divisors (see below), whose sum is σ = 4951320. Its totient is φ = 466560.

The previous prime is 1553897. The next prime is 1553927. The reversal of 1553904 is 4093551.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14202 + ... + 14310.

2^1553904 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 1553904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2475660).

1553904 is an abundant number, since it is smaller than the sum of its proper divisors (3397416).

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

1553904 is a wasteful number, since it uses less digits than its factorization.

1553904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1553904 is about 1246.5568579090. The cubic root of 1553904 is about 115.8265342293.

The spelling of 1553904 in words is "one million, five hundred fifty-three thousand, nine hundred four".