531450040 has 32 divisors (see below), whose sum is σ = 1304469360. Its totient is φ = 193254400.

The previous prime is 531450013. The next prime is 531450047. The reversal of 531450040 is 40054135.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 531449993 and 531450020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531450047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603481 + ... + 604360.

Almost surely, 2^531450040 is an apocalyptic number.

It is an amenable number.

531450040 is an abundant number, since it is smaller than the sum of its proper divisors (773019320).

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

531450040 is a wasteful number, since it uses less digits than its factorization.

531450040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207863 (or 1207859 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 531450040 is about 23053.2002116843. The cubic root of 531450040 is about 810.0045927698.

The spelling of 531450040 in words is "five hundred thirty-one million, four hundred fifty thousand, forty".