538467840 has 120 divisors (see below), whose sum is σ = 1864945368. Its totient is φ = 143585280.

The previous prime is 538467833. The next prime is 538467851. The reversal of 538467840 is 48764835.

538467840 is a `hidden beast` number, since 538 + 4 + 6 + 78 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×538467840² = 579895229428531200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11355 + ... + 34725.

Almost surely, 2^538467840 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 538467840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (932472684).

538467840 is an abundant number, since it is smaller than the sum of its proper divisors (1326477528).

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

538467840 is a wasteful number, since it uses less digits than its factorization.

538467840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23400 (or 23381 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 538467840 is about 23204.9098252934. The cubic root of 538467840 is about 813.5543846593.

The spelling of 538467840 in words is "five hundred thirty-eight million, four hundred sixty-seven thousand, eight hundred forty".