38307540 has 24 divisors (see below), whose sum is σ = 107261280. Its totient is φ = 10215328.

The previous prime is 38307523. The next prime is 38307541. The reversal of 38307540 is 4570383.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 38307498 and 38307507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38307541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319170 + ... + 319289.

It is an arithmetic number, because the mean of its divisors is an integer number (4469220).

Almost surely, 2^38307540 is an apocalyptic number.

38307540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38307540 is an abundant number, since it is smaller than the sum of its proper divisors (68953740).

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

38307540 is a wasteful number, since it uses less digits than its factorization.

38307540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638471 (or 638469 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 38307540 is about 6189.3085235751. The cubic root of 38307540 is about 337.1020714742.

The spelling of 38307540 in words is "thirty-eight million, three hundred seven thousand, five hundred forty".