38866420 has 48 divisors (see below), whose sum is σ = 87575040. Its totient is φ = 14436864.

The previous prime is 38866397. The next prime is 38866433. The reversal of 38866420 is 2466883.

It is a self number, because there is not a number n which added to its sum of digits gives 38866420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26137 + ... + 27583.

It is an arithmetic number, because the mean of its divisors is an integer number (1824480).

Almost surely, 2^38866420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38866420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43787520).

38866420 is an abundant number, since it is smaller than the sum of its proper divisors (48708620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38866420 is a wasteful number, since it uses less digits than its factorization.

38866420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 38866420 is about 6234.2938653868. The cubic root of 38866420 is about 338.7335236150.

The spelling of 38866420 in words is "thirty-eight million, eight hundred sixty-six thousand, four hundred twenty".