72028397 has 8 divisors (see below), whose sum is σ = 84232896. Its totient is φ = 60302592.

The previous prime is 72028379. The next prime is 72028403. The reversal of 72028397 is 79382027.

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

It is not a de Polignac number, because 72028397 - 2¹⁴ = 72012013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72028397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72028367) 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, 119348 + ... + 119949.

It is an arithmetic number, because the mean of its divisors is an integer number (10529112).

Almost surely, 2^72028397 is an apocalyptic number.

It is an amenable number.

72028397 is a deficient number, since it is larger than the sum of its proper divisors (12204499).

72028397 is a wasteful number, since it uses less digits than its factorization.

72028397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239347.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 72028397 is about 8486.9545185538. The cubic root of 72028397 is about 416.0714501442.

The spelling of 72028397 in words is "seventy-two million, twenty-eight thousand, three hundred ninety-seven".