538374240 has 144 divisors (see below), whose sum is σ = 1843457616. Its totient is φ = 143078400.

The previous prime is 538374229. The next prime is 538374247. The reversal of 538374240 is 42473835.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 538374195 and 538374204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538374247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 663435 + ... + 664245.

It is an arithmetic number, because the mean of its divisors is an integer number (12801789).

Almost surely, 2^538374240 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 538374240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921728808).

538374240 is an abundant number, since it is smaller than the sum of its proper divisors (1305083376).

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

538374240 is a wasteful number, since it uses less digits than its factorization.

538374240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293 (or 1282 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 538374240 is about 23202.8929230818. The cubic root of 538374240 is about 813.5072428139.

The spelling of 538374240 in words is "five hundred thirty-eight million, three hundred seventy-four thousand, two hundred forty".