38981745 has 48 divisors (see below), whose sum is σ = 74977344. Its totient is φ = 18576000.

The previous prime is 38981737. The next prime is 38981759. The reversal of 38981745 is 54718983.

It is not a de Polignac number, because 38981745 - 2³ = 38981737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 38981745.

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 in 47 ways as a sum of consecutive naturals, for example, 29550 + ... + 30840.

It is an arithmetic number, because the mean of its divisors is an integer number (1562028).

Almost surely, 2^38981745 is an apocalyptic number.

It is an amenable number.

38981745 is a deficient number, since it is larger than the sum of its proper divisors (35995599).

38981745 is a wasteful number, since it uses less digits than its factorization.

38981745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374 (or 1371 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 38981745 is about 6243.5362576027. The cubic root of 38981745 is about 339.0682244498.

The spelling of 38981745 in words is "thirty-eight million, nine hundred eighty-one thousand, seven hundred forty-five".