397780982 has 4 divisors (see below), whose sum is σ = 596671476. Its totient is φ = 198890490.

The previous prime is 397780937. The next prime is 397780987. The reversal of 397780982 is 289087793.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397780987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99445244 + ... + 99445247.

It is an arithmetic number, because the mean of its divisors is an integer number (149167869).

Almost surely, 2^397780982 is an apocalyptic number.

397780982 is a deficient number, since it is larger than the sum of its proper divisors (198890494).

397780982 is a wasteful number, since it uses less digits than its factorization.

397780982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198890493.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The square root of 397780982 is about 19944.4473977095. The cubic root of 397780982 is about 735.4412837438.

The spelling of 397780982 in words is "three hundred ninety-seven million, seven hundred eighty thousand, nine hundred eighty-two".