38440730 has 16 divisors (see below), whose sum is σ = 69291720. Its totient is φ = 15354432.

The previous prime is 38440729. The next prime is 38440763. The reversal of 38440730 is 3704483.

It can be written as a sum of positive squares in 4 ways, for example, as 27741289 + 10699441 = 5267^2 + 3271^2 .

It is a junction number, because it is equal to n+sod(n) for n = 38440693 and 38440702.

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, 5972 + ... + 10608.

Almost surely, 2^38440730 is an apocalyptic number.

38440730 is a deficient number, since it is larger than the sum of its proper divisors (30850990).

38440730 is a wasteful number, since it uses less digits than its factorization.

38440730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5473.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 38440730 is about 6200.0588706882. The cubic root of 38440730 is about 337.4923052658.

It can be divided in two parts, 384 and 40730, that added together give a palindrome (41114).

The spelling of 38440730 in words is "thirty-eight million, four hundred forty thousand, seven hundred thirty".