396477720 has 128 divisors (see below), whose sum is σ = 1337817600. Its totient is φ = 104429952.

The previous prime is 396477713. The next prime is 396477727. The reversal of 396477720 is 27774693.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (396477713) and next prime (396477727).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396477727) by changing a digit.

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, 87429 + ... + 91851.

It is an arithmetic number, because the mean of its divisors is an integer number (10451700).

Almost surely, 2^396477720 is an apocalyptic number.

396477720 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 396477720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668908800).

396477720 is an abundant number, since it is smaller than the sum of its proper divisors (941339880).

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

396477720 is a wasteful number, since it uses less digits than its factorization.

396477720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4526 (or 4516 counting only the distinct ones).

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

The square root of 396477720 is about 19911.7482908960. The cubic root of 396477720 is about 734.6372220541.

The spelling of 396477720 in words is "three hundred ninety-six million, four hundred seventy-seven thousand, seven hundred twenty".