38940040 has 32 divisors (see below), whose sum is σ = 90639000. Its totient is φ = 15038464.

The previous prime is 38940029. The next prime is 38940053. The reversal of 38940040 is 4004983.

It can be written as a sum of positive squares in 4 ways, for example, as 22146436 + 16793604 = 4706^2 + 4098^2 .

It is a junction number, because it is equal to n+sod(n) for n = 38939990 and 38940008.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15625 + ... + 17944.

Almost surely, 2^38940040 is an apocalyptic number.

It is an amenable number.

38940040 is an abundant number, since it is smaller than the sum of its proper divisors (51698960).

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

38940040 is a wasteful number, since it uses less digits than its factorization.

38940040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33609 (or 33605 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 38940040 is about 6240.1955097577. The cubic root of 38940040 is about 338.9472628201.

The spelling of 38940040 in words is "thirty-eight million, nine hundred forty thousand, forty".