38138742 has 32 divisors (see below), whose sum is σ = 87490560. Its totient is φ = 12302280.

The previous prime is 38138731. The next prime is 38138753. The reversal of 38138742 is 24783183.

It is an interprime number because it is at equal distance from previous prime (38138731) and next prime (38138753).

It is a junction number, because it is equal to n+sod(n) for n = 38138697 and 38138706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9718 + ... + 13065.

It is an arithmetic number, because the mean of its divisors is an integer number (2734080).

Almost surely, 2^38138742 is an apocalyptic number.

38138742 is an abundant number, since it is smaller than the sum of its proper divisors (49351818).

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

38138742 is a wasteful number, since it uses less digits than its factorization.

38138742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22825 (or 22819 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 38138742 is about 6175.6572119897. The cubic root of 38138742 is about 336.6062079237.

The spelling of 38138742 in words is "thirty-eight million, one hundred thirty-eight thousand, seven hundred forty-two".