396766540 has 48 divisors (see below), whose sum is σ = 863755200. Its totient is φ = 152969472.

The previous prime is 396766523. The next prime is 396766541. The reversal of 396766540 is 45667693.

It is not an unprimeable number, because it can be changed into a prime (396766541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78201 + ... + 83119.

It is an arithmetic number, because the mean of its divisors is an integer number (17994900).

Almost surely, 2^396766540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 396766540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (431877600).

396766540 is an abundant number, since it is smaller than the sum of its proper divisors (466988660).

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

396766540 is a wasteful number, since it uses less digits than its factorization.

396766540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5074 (or 5072 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 46.

The square root of 396766540 is about 19918.9994728651. Note that the first 3 decimals coincide. The cubic root of 396766540 is about 734.8155645024.

It can be divided in two parts, 3967 and 66540, that added together give a palindrome (70507).

The spelling of 396766540 in words is "three hundred ninety-six million, seven hundred sixty-six thousand, five hundred forty".