38507540 has 24 divisors (see below), whose sum is σ = 81012960. Its totient is φ = 15375008.

The previous prime is 38507519. The next prime is 38507561. The reversal of 38507540 is 4570583.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (38507519) and next prime (38507561).

It is a junction number, because it is equal to n+sod(n) for n = 38507497 and 38507506.

It is a congruent number.

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, 12251 + ... + 15069.

It is an arithmetic number, because the mean of its divisors is an integer number (3375540).

Almost surely, 2^38507540 is an apocalyptic number.

It is an amenable number.

38507540 is an abundant number, since it is smaller than the sum of its proper divisors (42505420).

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

38507540 is a wasteful number, since it uses less digits than its factorization.

38507540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3511 (or 3509 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 38507540 is about 6205.4443837650. Note that the first 3 decimals coincide. The cubic root of 38507540 is about 337.6877126786.

The spelling of 38507540 in words is "thirty-eight million, five hundred seven thousand, five hundred forty".