396980540 has 48 divisors (see below), whose sum is σ = 918328320. Its totient is φ = 142946880.

The previous prime is 396980527. The next prime is 396980557. The reversal of 396980540 is 45089693.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 396980491 and 396980500.

It is a congruent number.

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, 13901 + ... + 31419.

It is an arithmetic number, because the mean of its divisors is an integer number (19131840).

Almost surely, 2^396980540 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 396980540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (459164160).

396980540 is an abundant number, since it is smaller than the sum of its proper divisors (521347780).

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

396980540 is a wasteful number, since it uses less digits than its factorization.

396980540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17642 (or 17640 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 396980540 is about 19924.3705044852. The cubic root of 396980540 is about 734.9476507983.

The spelling of 396980540 in words is "three hundred ninety-six million, nine hundred eighty thousand, five hundred forty".