397189042 has 16 divisors (see below), whose sum is σ = 600589080. Its totient is φ = 196999552.

The previous prime is 397189031. The next prime is 397189061. The reversal of 397189042 is 240981793.

It can be written as a sum of positive squares in 4 ways, for example, as 395254161 + 1934881 = 19881^2 + 1391^2 .

It is a super-3 number, since 3×397189042³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 397189042.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135084 + ... + 137992.

Almost surely, 2^397189042 is an apocalyptic number.

397189042 is a deficient number, since it is larger than the sum of its proper divisors (203400038).

397189042 is a wasteful number, since it uses less digits than its factorization.

397189042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3437.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 397189042 is about 19929.6021535805. The cubic root of 397189042 is about 735.0762979397.

The spelling of 397189042 in words is "three hundred ninety-seven million, one hundred eighty-nine thousand, forty-two".