538693440 has 112 divisors (see below), whose sum is σ = 1738579200. Its totient is φ = 141281280.

The previous prime is 538693427. The next prime is 538693451. The reversal of 538693440 is 44396835.

It is a junction number, because it is equal to n+sod(n) for n = 538693392 and 538693401.

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, 53961 + ... + 63159.

Almost surely, 2^538693440 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 538693440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (869289600).

538693440 is an abundant number, since it is smaller than the sum of its proper divisors (1199885760).

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

538693440 is a wasteful number, since it uses less digits than its factorization.

538693440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9280 (or 9270 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 538693440 is about 23209.7703564684. The cubic root of 538693440 is about 813.6679861470.

The spelling of 538693440 in words is "five hundred thirty-eight million, six hundred ninety-three thousand, four hundred forty".