538256394 has 64 divisors (see below), whose sum is σ = 1294944000. Its totient is φ = 164742336.

The previous prime is 538256387. The next prime is 538256449. The reversal of 538256394 is 493652835.

538256394 is a `hidden beast` number, since 5 + 3 + 8 + 2 + 5 + 639 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137772 + ... + 141624.

It is an arithmetic number, because the mean of its divisors is an integer number (20233500).

Almost surely, 2^538256394 is an apocalyptic number.

538256394 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 538256394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (647472000).

538256394 is an abundant number, since it is smaller than the sum of its proper divisors (756687606).

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

538256394 is a wasteful number, since it uses less digits than its factorization.

538256394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4076 (or 4070 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 538256394 is about 23200.3533162752. The cubic root of 538256394 is about 813.4478816463.

It can be divided in two parts, 5382 and 56394, that added together give a triangular number (61776 = T₃₅₁).

The spelling of 538256394 in words is "five hundred thirty-eight million, two hundred fifty-six thousand, three hundred ninety-four".