38555840 has 56 divisors (see below), whose sum is σ = 93159072. Its totient is φ = 15196160.

The previous prime is 38555809. The next prime is 38555879. The reversal of 38555840 is 4855583.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 38555794 and 38555803.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21872 + ... + 23568.

Almost surely, 2^38555840 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 38555840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46579536).

38555840 is an abundant number, since it is smaller than the sum of its proper divisors (54603232).

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

38555840 is a wasteful number, since it uses less digits than its factorization.

38555840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785 (or 1775 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 38.

The square root of 38555840 is about 6209.3349080236. The cubic root of 38555840 is about 337.8288409003.

The spelling of 38555840 in words is "thirty-eight million, five hundred fifty-five thousand, eight hundred forty".