38749157 has 4 divisors (see below), whose sum is σ = 38769120. Its totient is φ = 38729196.

The previous prime is 38749147. The next prime is 38749159. The reversal of 38749157 is 75194783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75194783 = 47 ⋅1599889.

It is a cyclic number.

It is not a de Polignac number, because 38749157 - 2¹⁶ = 38683621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38749159) 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, 6713 + ... + 11070.

It is an arithmetic number, because the mean of its divisors is an integer number (9692280).

Almost surely, 2^38749157 is an apocalyptic number.

It is an amenable number.

38749157 is a deficient number, since it is larger than the sum of its proper divisors (19963).

38749157 is a wasteful number, since it uses less digits than its factorization.

38749157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19962.

The product of its digits is 211680, while the sum is 44.

The square root of 38749157 is about 6224.8820872367. The cubic root of 38749157 is about 338.3925186782.

It can be divided in two parts, 3874 and 9157, that added together give a palindrome (13031).

The spelling of 38749157 in words is "thirty-eight million, seven hundred forty-nine thousand, one hundred fifty-seven".