397028015 has 4 divisors (see below), whose sum is σ = 476433624. Its totient is φ = 317622408.

The previous prime is 397028011. The next prime is 397028017. The reversal of 397028015 is 510820793.

397028015 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 510820793 = 7 ⋅72974399.

It is a cyclic number.

It is not a de Polignac number, because 397028015 - 2² = 397028011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397028011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39702797 + ... + 39702806.

It is an arithmetic number, because the mean of its divisors is an integer number (119108406).

Almost surely, 2^397028015 is an apocalyptic number.

397028015 is a deficient number, since it is larger than the sum of its proper divisors (79405609).

397028015 is an equidigital number, since it uses as much as digits as its factorization.

397028015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79405608.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 397028015 is about 19925.5618490420. The cubic root of 397028015 is about 734.9769471536.

The spelling of 397028015 in words is "three hundred ninety-seven million, twenty-eight thousand, fifteen".