38289887 has 4 divisors (see below), whose sum is σ = 38814480. Its totient is φ = 37765296.

The previous prime is 38289833. The next prime is 38289893. The reversal of 38289887 is 78898283.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78898283 = 7351 ⋅10733.

It is a cyclic number.

It is not a de Polignac number, because 38289887 - 2¹² = 38285791 is a prime.

It is a super-2 number, since 2×38289887² = 2932230892945538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38289827) 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, 262187 + ... + 262332.

It is an arithmetic number, because the mean of its divisors is an integer number (9703620).

Almost surely, 2^38289887 is an apocalyptic number.

38289887 is a deficient number, since it is larger than the sum of its proper divisors (524593).

38289887 is an equidigital number, since it uses as much as digits as its factorization.

38289887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524592.

The product of its digits is 1548288, while the sum is 53.

The square root of 38289887 is about 6187.8822710197. The cubic root of 38289887 is about 337.0502820423.

The spelling of 38289887 in words is "thirty-eight million, two hundred eighty-nine thousand, eight hundred eighty-seven".