38431378 has 4 divisors (see below), whose sum is σ = 57647070. Its totient is φ = 19215688.

The previous prime is 38431331. The next prime is 38431397. The reversal of 38431378 is 87313483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87313483 = 97 ⋅900139.

It can be written as a sum of positive squares in only one way, i.e., 37908649 + 522729 = 6157^2 + 723^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9607843 + ... + 9607846.

Almost surely, 2^38431378 is an apocalyptic number.

38431378 is a deficient number, since it is larger than the sum of its proper divisors (19215692).

38431378 is a wasteful number, since it uses less digits than its factorization.

38431378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19215691.

The product of its digits is 48384, while the sum is 37.

The square root of 38431378 is about 6199.3046384252. The cubic root of 38431378 is about 337.4649342627.

It can be divided in two parts, 38431 and 378, that added together give a square (38809 = 197²).

The spelling of 38431378 in words is "thirty-eight million, four hundred thirty-one thousand, three hundred seventy-eight".