397854720 has 192 divisors, whose sum is σ = 1415232000. Its totient is φ = 106020864.

The previous prime is 397854707. The next prime is 397854731. The reversal of 397854720 is 27458793.

397854720 is a `hidden beast` number, since 39 + 78 + 547 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275761 + ... + 277199.

It is an arithmetic number, because the mean of its divisors is an integer number (7371000).

Almost surely, 2^397854720 is an apocalyptic number.

397854720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 397854720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (707616000).

397854720 is an abundant number, since it is smaller than the sum of its proper divisors (1017377280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397854720 is a wasteful number, since it uses less digits than its factorization.

397854720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475 (or 1449 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 397854720 is about 19946.2958967323. The cubic root of 397854720 is about 735.4867246784.

The spelling of 397854720 in words is "three hundred ninety-seven million, eight hundred fifty-four thousand, seven hundred twenty".