38193840 has 60 divisors (see below), whose sum is σ = 128270064. Its totient is φ = 10184832.

The previous prime is 38193839. The next prime is 38193851. The reversal of 38193840 is 4839183.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 38193795 and 38193804.

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 11 ways as a sum of consecutive naturals, for example, 25804 + ... + 27243.

Almost surely, 2^38193840 is an apocalyptic number.

38193840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38193840 is an abundant number, since it is smaller than the sum of its proper divisors (90076224).

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

38193840 is a wasteful number, since it uses less digits than its factorization.

38193840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53066 (or 53057 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 38193840 is about 6180.1165037562. The cubic root of 38193840 is about 336.7682251964.

The spelling of 38193840 in words is "thirty-eight million, one hundred ninety-three thousand, eight hundred forty".