396915140 has 48 divisors (see below), whose sum is σ = 875750400. Its totient is φ = 150817920.

The previous prime is 396915131. The next prime is 396915143. The reversal of 396915140 is 41519693.

It is a super-2 number, since 2×396915140² = 315083256722439200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 396915094 and 396915103.

It is not an unprimeable number, because it can be changed into a prime (396915143) 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, 65645 + ... + 71435.

It is an arithmetic number, because the mean of its divisors is an integer number (18244800).

Almost surely, 2^396915140 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 396915140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437875200).

396915140 is an abundant number, since it is smaller than the sum of its proper divisors (478835260).

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

396915140 is a wasteful number, since it uses less digits than its factorization.

396915140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5972 (or 5970 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 396915140 is about 19922.7292307053. The cubic root of 396915140 is about 734.9072892765.

The spelling of 396915140 in words is "three hundred ninety-six million, nine hundred fifteen thousand, one hundred forty".