38428157 has 2 divisors, whose sum is σ = 38428158. Its totient is φ = 38428156.

The previous prime is 38428133. The next prime is 38428171. The reversal of 38428157 is 75182483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34916281 + 3511876 = 5909^2 + 1874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38428157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38428157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38428757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19214078 + 19214079.

It is an arithmetic number, because the mean of its divisors is an integer number (19214079).

Almost surely, 2^38428157 is an apocalyptic number.

It is an amenable number.

38428157 is a deficient number, since it is larger than the sum of its proper divisors (1).

38428157 is an equidigital number, since it uses as much as digits as its factorization.

38428157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 38.

The square root of 38428157 is about 6199.0448457807. The cubic root of 38428157 is about 337.4555061601.

The spelling of 38428157 in words is "thirty-eight million, four hundred twenty-eight thousand, one hundred fifty-seven".