397999342 has 32 divisors (see below), whose sum is σ = 687832992. Its totient is φ = 171085824.

The previous prime is 397999333. The next prime is 397999351. The reversal of 397999342 is 243999793.

It is an interprime number because it is at equal distance from previous prime (397999333) and next prime (397999351).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38233 + ... + 47515.

It is an arithmetic number, because the mean of its divisors is an integer number (21494781).

Almost surely, 2^397999342 is an apocalyptic number.

397999342 is a deficient number, since it is larger than the sum of its proper divisors (289833650).

397999342 is a wasteful number, since it uses less digits than its factorization.

397999342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9412.

The product of its digits is 3306744, while the sum is 55.

The square root of 397999342 is about 19949.9208519733. The cubic root of 397999342 is about 735.5758314721.

It can be divided in two parts, 39799 and 9342, that added together give a triangular number (49141 = T₃₁₃).

The spelling of 397999342 in words is "three hundred ninety-seven million, nine hundred ninety-nine thousand, three hundred forty-two".