38305040 has 20 divisors (see below), whose sum is σ = 89059404. Its totient is φ = 15321984.

The previous prime is 38305031. The next prime is 38305049. The reversal of 38305040 is 4050383.

It is an interprime number because it is at equal distance from previous prime (38305031) and next prime (38305049).

It can be written as a sum of positive squares in 2 ways, for example, as 24880144 + 13424896 = 4988^2 + 3664^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 38304997 and 38305015.

It is not an unprimeable number, because it can be changed into a prime (38305049) 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, 239327 + ... + 239486.

Almost surely, 2^38305040 is an apocalyptic number.

It is an amenable number.

38305040 is an abundant number, since it is smaller than the sum of its proper divisors (50754364).

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

38305040 is a wasteful number, since it uses less digits than its factorization.

38305040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478826 (or 478820 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 38305040 is about 6189.1065591085. The cubic root of 38305040 is about 337.0947380744.

The spelling of 38305040 in words is "thirty-eight million, three hundred five thousand, forty".