397388648 has 32 divisors (see below), whose sum is σ = 797196000. Its totient is φ = 185146560.

The previous prime is 397388627. The next prime is 397388669. The reversal of 397388648 is 846883793.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (397388627) and next prime (397388669).

It is a junction number, because it is equal to n+sod(n) for n = 397388593 and 397388602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12158 + ... + 30701.

It is an arithmetic number, because the mean of its divisors is an integer number (24912375).

Almost surely, 2^397388648 is an apocalyptic number.

397388648 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

397388648 is an abundant number, since it is smaller than the sum of its proper divisors (399807352).

397388648 is a wasteful number, since it uses less digits than its factorization.

397388648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42945 (or 42941 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 56.

The square root of 397388648 is about 19934.6093014135. The cubic root of 397388648 is about 735.1994140146.

The spelling of 397388648 in words is "three hundred ninety-seven million, three hundred eighty-eight thousand, six hundred forty-eight".