38421940 has 12 divisors (see below), whose sum is σ = 80686116. Its totient is φ = 15368768.

The previous prime is 38421931. The next prime is 38421941. The reversal of 38421940 is 4912483.

It can be written as a sum of positive squares in 2 ways, for example, as 8259876 + 30162064 = 2874^2 + 5492^2 .

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38421941) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 960529 + ... + 960568.

It is an arithmetic number, because the mean of its divisors is an integer number (6723843).

Almost surely, 2^38421940 is an apocalyptic number.

It is an amenable number.

38421940 is an abundant number, since it is smaller than the sum of its proper divisors (42264176).

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

38421940 is a wasteful number, since it uses less digits than its factorization.

38421940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921106 (or 1921104 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 38421940 is about 6198.5433772782. The cubic root of 38421940 is about 337.4373070565.

The spelling of 38421940 in words is "thirty-eight million, four hundred twenty-one thousand, nine hundred forty".