38540730 has 16 divisors (see below), whose sum is σ = 92497824. Its totient is φ = 10277520.

The previous prime is 38540707. The next prime is 38540731. The reversal of 38540730 is 3704583.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1284691 = 38540730 / (3 + 8 + 5 + 4 + 0 + 7 + 3 + 0).

It is not an unprimeable number, because it can be changed into a prime (38540731) 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, 642316 + ... + 642375.

It is an arithmetic number, because the mean of its divisors is an integer number (5781114).

Almost surely, 2^38540730 is an apocalyptic number.

38540730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38540730 is an abundant number, since it is smaller than the sum of its proper divisors (53957094).

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

38540730 is a wasteful number, since it uses less digits than its factorization.

38540730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284701.

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

The square root of 38540730 is about 6208.1180723308. The cubic root of 38540730 is about 337.7847035248.

The spelling of 38540730 in words is "thirty-eight million, five hundred forty thousand, seven hundred thirty".