38402747 has 4 divisors (see below), whose sum is σ = 38426136. Its totient is φ = 38379360.

The previous prime is 38402737. The next prime is 38402761. The reversal of 38402747 is 74720483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74720483 = 19 ⋅3932657.

It is a cyclic number.

It is not a de Polignac number, because 38402747 - 2⁴ = 38402731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38402717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9029 + ... + 12582.

It is an arithmetic number, because the mean of its divisors is an integer number (9606534).

Almost surely, 2^38402747 is an apocalyptic number.

38402747 is a deficient number, since it is larger than the sum of its proper divisors (23389).

38402747 is a wasteful number, since it uses less digits than its factorization.

38402747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23388.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 38402747 is about 6196.9949975775. The cubic root of 38402747 is about 337.3811107536.

The spelling of 38402747 in words is "thirty-eight million, four hundred two thousand, seven hundred forty-seven".