503455440 has 80 divisors (see below), whose sum is σ = 1566024768. Its totient is φ = 133797888.

The previous prime is 503455439. The next prime is 503455453. The reversal of 503455440 is 44554305.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 503455398 and 503455407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70264 + ... + 77096.

Almost surely, 2^503455440 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 503455440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (783012384).

503455440 is an abundant number, since it is smaller than the sum of its proper divisors (1062569328).

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

503455440 is a wasteful number, since it uses less digits than its factorization.

503455440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7156 (or 7150 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 30.

The square root of 503455440 is about 22437.8127276257. The cubic root of 503455440 is about 795.5247198509.

The spelling of 503455440 in words is "five hundred three million, four hundred fifty-five thousand, four hundred forty".