396774720 has 224 divisors, whose sum is σ = 1474012800. Its totient is φ = 100196352.

The previous prime is 396774661. The next prime is 396774751. The reversal of 396774720 is 27477693.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 162952 + ... + 165368.

Almost surely, 2^396774720 is an apocalyptic number.

396774720 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 396774720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737006400).

396774720 is an abundant number, since it is smaller than the sum of its proper divisors (1077238080).

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

396774720 is a wasteful number, since it uses less digits than its factorization.

396774720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2462 (or 2446 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 45.

The square root of 396774720 is about 19919.2048034052. The cubic root of 396774720 is about 734.8206142814.

It can be divided in two parts, 3967 and 74720, that added together give a palindrome (78687).

The spelling of 396774720 in words is "three hundred ninety-six million, seven hundred seventy-four thousand, seven hundred twenty".