37728213 has 8 divisors (see below), whose sum is σ = 50332800. Its totient is φ = 25137888.

The previous prime is 37728203. The next prime is 37728227. The reversal of 37728213 is 31282773.

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

It is not a de Polignac number, because 37728213 - 2⁶ = 37728149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37728203) 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, 7668 + ... + 11586.

It is an arithmetic number, because the mean of its divisors is an integer number (6291600).

Almost surely, 2^37728213 is an apocalyptic number.

It is an amenable number.

37728213 is a deficient number, since it is larger than the sum of its proper divisors (12604587).

37728213 is a wasteful number, since it uses less digits than its factorization.

37728213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131.

The product of its digits is 14112, while the sum is 33.

The square root of 37728213 is about 6142.3296069163. The cubic root of 37728213 is about 335.3940947548.

The spelling of 37728213 in words is "thirty-seven million, seven hundred twenty-eight thousand, two hundred thirteen".