397848742 has 4 divisors (see below), whose sum is σ = 596773116. Its totient is φ = 198924370.

The previous prime is 397848697. The next prime is 397848743. The reversal of 397848742 is 247848793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247848793 = 59 ⋅4200827.

It is a self number, because there is not a number n which added to its sum of digits gives 397848742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397848743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99462184 + ... + 99462187.

It is an arithmetic number, because the mean of its divisors is an integer number (149193279).

Almost surely, 2^397848742 is an apocalyptic number.

397848742 is a deficient number, since it is larger than the sum of its proper divisors (198924374).

397848742 is a wasteful number, since it uses less digits than its factorization.

397848742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198924373.

The product of its digits is 2709504, while the sum is 52.

The square root of 397848742 is about 19946.1460437850. The cubic root of 397848742 is about 735.4830409538.

The spelling of 397848742 in words is "three hundred ninety-seven million, eight hundred forty-eight thousand, seven hundred forty-two".