538365440 has 40 divisors (see below), whose sum is σ = 1290821400. Its totient is φ = 215345152.

The previous prime is 538365431. The next prime is 538365449. The reversal of 538365440 is 44563835.

It is an interprime number because it is at equal distance from previous prime (538365431) and next prime (538365449).

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-4 number, since 4×538365440⁴ (a number of 36 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 538365394 and 538365403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538365449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102590 + ... + 107709.

It is an arithmetic number, because the mean of its divisors is an integer number (32270535).

Almost surely, 2^538365440 is an apocalyptic number.

It is an amenable number.

538365440 is an abundant number, since it is smaller than the sum of its proper divisors (752455960).

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

538365440 is an equidigital number, since it uses as much as digits as its factorization.

538365440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210322 (or 210306 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 538365440 is about 23202.7032907806. The cubic root of 538365440 is about 813.5028103936.

The spelling of 538365440 in words is "five hundred thirty-eight million, three hundred sixty-five thousand, four hundred forty".