397826515 has 12 divisors (see below), whose sum is σ = 499053744. Its totient is φ = 304421744.

The previous prime is 397826489. The next prime is 397826519. The reversal of 397826515 is 515628793.

397826515 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 397826515 - 2⁵ = 397826483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397826519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72559 + ... + 77848.

It is an arithmetic number, because the mean of its divisors is an integer number (41587812).

Almost surely, 2^397826515 is an apocalyptic number.

397826515 is a deficient number, since it is larger than the sum of its proper divisors (101227229).

397826515 is a wasteful number, since it uses less digits than its factorization.

397826515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150458 (or 150435 counting only the distinct ones).

The product of its digits is 453600, while the sum is 46.

The square root of 397826515 is about 19945.5888606980. The cubic root of 397826515 is about 735.4693440516.

The spelling of 397826515 in words is "three hundred ninety-seven million, eight hundred twenty-six thousand, five hundred fifteen".