397638469 has 8 divisors (see below), whose sum is σ = 399313152. Its totient is φ = 395968320.

The previous prime is 397638463. The next prime is 397638487. The reversal of 397638469 is 964836793.

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

It is a cyclic number.

It is not a de Polignac number, because 397638469 - 2¹⁵ = 397605701 is a prime.

It is a super-2 number, since 2×397638469² = 316232704057327922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397638463) 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, 450909 + ... + 451789.

It is an arithmetic number, because the mean of its divisors is an integer number (49914144).

Almost surely, 2^397638469 is an apocalyptic number.

It is an amenable number.

397638469 is a deficient number, since it is larger than the sum of its proper divisors (1674683).

397638469 is an equidigital number, since it uses as much as digits as its factorization.

397638469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267.

The product of its digits is 5878656, while the sum is 55.

The square root of 397638469 is about 19940.8743288754. The cubic root of 397638469 is about 735.3534443986.

The spelling of 397638469 in words is "three hundred ninety-seven million, six hundred thirty-eight thousand, four hundred sixty-nine".