38890771 has 4 divisors (see below), whose sum is σ = 40145344. Its totient is φ = 37636200.

The previous prime is 38890763. The next prime is 38890783. The reversal of 38890771 is 17709883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17709883 = 1571 ⋅11273.

It is a cyclic number.

It is not a de Polignac number, because 38890771 - 2³ = 38890763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38890741) 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, 627240 + ... + 627301.

It is an arithmetic number, because the mean of its divisors is an integer number (10036336).

Almost surely, 2^38890771 is an apocalyptic number.

38890771 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

38890771 is a deficient number, since it is larger than the sum of its proper divisors (1254573).

38890771 is a wasteful number, since it uses less digits than its factorization.

38890771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254572.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 38890771 is about 6236.2465474033. The cubic root of 38890771 is about 338.8042511479.

The spelling of 38890771 in words is "thirty-eight million, eight hundred ninety thousand, seven hundred seventy-one".