37728397 has 8 divisors (see below), whose sum is σ = 43638336. Its totient is φ = 31948512.

The previous prime is 37728347. The next prime is 37728401. The reversal of 37728397 is 79382773.

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 37728397 - 2¹⁵ = 37695629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37728337) 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, 31888 + ... + 33049.

It is an arithmetic number, because the mean of its divisors is an integer number (5454792).

Almost surely, 2^37728397 is an apocalyptic number.

It is an amenable number.

37728397 is a deficient number, since it is larger than the sum of its proper divisors (5909939).

37728397 is an equidigital number, since it uses as much as digits as its factorization.

37728397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65027.

The product of its digits is 444528, while the sum is 46.

The square root of 37728397 is about 6142.3445849285. The cubic root of 37728397 is about 335.3946399914.

It can be divided in two parts, 3 and 7728397, that added together give a square (7728400 = 2780²).

The spelling of 37728397 in words is "thirty-seven million, seven hundred twenty-eight thousand, three hundred ninety-seven".