37944021 has 8 divisors (see below), whose sum is σ = 51449760. Its totient is φ = 24867152.

The previous prime is 37943987. The next prime is 37944029. The reversal of 37944021 is 12044973.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 37944021 - 2⁶ = 37943957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 37944021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37944029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107010 + ... + 107363.

It is an arithmetic number, because the mean of its divisors is an integer number (6431220).

Almost surely, 2^37944021 is an apocalyptic number.

It is an amenable number.

37944021 is a deficient number, since it is larger than the sum of its proper divisors (13505739).

37944021 is a wasteful number, since it uses less digits than its factorization.

37944021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214435.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 37944021 is about 6159.8718330822. The cubic root of 37944021 is about 336.0323718102.

Adding to 37944021 its reverse (12044973), we get a palindrome (49988994).

The spelling of 37944021 in words is "thirty-seven million, nine hundred forty-four thousand, twenty-one".