397803026 has 8 divisors (see below), whose sum is σ = 631804860. Its totient is φ = 187201408.

The previous prime is 397803023. The next prime is 397803037. The reversal of 397803026 is 620308793.

It is a Cunningham number, because it is equal to 19945²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 397803025 + 1 = 19945^2 + 1^2 .

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

It is not an unprimeable number, because it can be changed into a prime (397803023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5850011 + ... + 5850078.

Almost surely, 2^397803026 is an apocalyptic number.

397803026 is a deficient number, since it is larger than the sum of its proper divisors (234001834).

397803026 is a wasteful number, since it uses less digits than its factorization.

397803026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11700108.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 397803026 is about 19945.0000250689. Note that the first 4 decimals coincide. The cubic root of 397803026 is about 735.4548689150.

The spelling of 397803026 in words is "three hundred ninety-seven million, eight hundred three thousand, twenty-six".