397223854 has 16 divisors (see below), whose sum is σ = 599063040. Its totient is φ = 197539840.

The previous prime is 397223851. The next prime is 397223881. The reversal of 397223854 is 458322793.

It is a super-2 number, since 2×397223854² = 315573580373226632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 397223854.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397223851) 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, 490602 + ... + 491410.

It is an arithmetic number, because the mean of its divisors is an integer number (37441440).

Almost surely, 2^397223854 is an apocalyptic number.

397223854 is a deficient number, since it is larger than the sum of its proper divisors (201839186).

397223854 is a wasteful number, since it uses less digits than its factorization.

397223854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835.

The product of its digits is 362880, while the sum is 43.

The square root of 397223854 is about 19930.4755086275. The cubic root of 397223854 is about 735.0977727924.

The spelling of 397223854 in words is "three hundred ninety-seven million, two hundred twenty-three thousand, eight hundred fifty-four".