397151642 has 16 divisors (see below), whose sum is σ = 634132800. Its totient is φ = 186009120.

The previous prime is 397151641. The next prime is 397151647. The reversal of 397151642 is 246151793.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 397151596 and 397151605.

It is not an unprimeable number, because it can be changed into a prime (397151641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55334 + ... + 62097.

It is an arithmetic number, because the mean of its divisors is an integer number (39633300).

Almost surely, 2^397151642 is an apocalyptic number.

397151642 is a deficient number, since it is larger than the sum of its proper divisors (236981158).

397151642 is a wasteful number, since it uses less digits than its factorization.

397151642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117541.

The product of its digits is 45360, while the sum is 38.

The square root of 397151642 is about 19928.6638287668. The cubic root of 397151642 is about 735.0532252014.

It can be divided in two parts, 397151 and 642, that added together give a palindrome (397793).

The spelling of 397151642 in words is "three hundred ninety-seven million, one hundred fifty-one thousand, six hundred forty-two".