538453440 has 448 divisors, whose sum is σ = 2253081600. Its totient is φ = 118444032.

The previous prime is 538453397. The next prime is 538453463. The reversal of 538453440 is 44354835.

538453440 is a `hidden beast` number, since 5 + 3 + 84 + 534 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

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 = 538453395 and 538453404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1753767 + ... + 1754073.

It is an arithmetic number, because the mean of its divisors is an integer number (5029200).

Almost surely, 2^538453440 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 538453440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1126540800).

538453440 is an abundant number, since it is smaller than the sum of its proper divisors (1714628160).

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

538453440 is a wasteful number, since it uses less digits than its factorization.

538453440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 538453440 is about 23204.5995440559. The cubic root of 538453440 is about 813.5471324233.

The spelling of 538453440 in words is "five hundred thirty-eight million, four hundred fifty-three thousand, four hundred forty".