397954645 has 32 divisors (see below), whose sum is σ = 534055680. Its totient is φ = 282240000.

The previous prime is 397954643. The next prime is 397954673. The reversal of 397954645 is 546459793.

It is a happy number.

It is not a de Polignac number, because 397954645 - 2¹ = 397954643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397954592 and 397954601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397954643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 393901 + ... + 394909.

It is an arithmetic number, because the mean of its divisors is an integer number (16689240).

Almost surely, 2^397954645 is an apocalyptic number.

It is an amenable number.

397954645 is a deficient number, since it is larger than the sum of its proper divisors (136101035).

397954645 is a wasteful number, since it uses less digits than its factorization.

397954645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197.

The product of its digits is 4082400, while the sum is 52.

The square root of 397954645 is about 19948.8005905117. The cubic root of 397954645 is about 735.5482943547.

The spelling of 397954645 in words is "three hundred ninety-seven million, nine hundred fifty-four thousand, six hundred forty-five".