397838403 has 12 divisors (see below), whose sum is σ = 608458968. Its totient is φ = 249624000.

The previous prime is 397838387. The next prime is 397838411. The reversal of 397838403 is 304838793.

It is a happy number.

It is not a de Polignac number, because 397838403 - 2⁴ = 397838387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397838423) 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, 1299973 + ... + 1300278.

It is an arithmetic number, because the mean of its divisors is an integer number (50704914).

Almost surely, 2^397838403 is an apocalyptic number.

397838403 is a deficient number, since it is larger than the sum of its proper divisors (210620565).

397838403 is a wasteful number, since it uses less digits than its factorization.

397838403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2600274 (or 2600271 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 397838403 is about 19945.8868692269. The cubic root of 397838403 is about 735.4766698348.

The spelling of 397838403 in words is "three hundred ninety-seven million, eight hundred thirty-eight thousand, four hundred three".