397748509405 has 32 divisors (see below), whose sum is σ = 526056410880. Its totient is φ = 286842608640.

The previous prime is 397748509399. The next prime is 397748509427. The reversal of 397748509405 is 504905847793.

It is a de Polignac number, because none of the positive numbers 2^k-397748509405 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28750840 + ... + 28764670.

It is an arithmetic number, because the mean of its divisors is an integer number (16439262840).

Almost surely, 2^397748509405 is an apocalyptic number.

It is an amenable number.

397748509405 is a deficient number, since it is larger than the sum of its proper divisors (128307901475).

397748509405 is a wasteful number, since it uses less digits than its factorization.

397748509405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24181.

The product of its (nonzero) digits is 38102400, while the sum is 61.

The spelling of 397748509405 in words is "three hundred ninety-seven billion, seven hundred forty-eight million, five hundred nine thousand, four hundred five".