397729080 has 192 divisors, whose sum is σ = 1507896000. Its totient is φ = 90881280.

The previous prime is 397729067. The next prime is 397729081. The reversal of 397729080 is 80927793.

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 (397729081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121870 + ... + 125090.

It is an arithmetic number, because the mean of its divisors is an integer number (7853625).

Almost surely, 2^397729080 is an apocalyptic number.

397729080 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 397729080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (753948000).

397729080 is an abundant number, since it is smaller than the sum of its proper divisors (1110166920).

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

397729080 is a wasteful number, since it uses less digits than its factorization.

397729080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3259 (or 3238 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 397729080 is about 19943.1461911104. The cubic root of 397729080 is about 735.4092958446.

The spelling of 397729080 in words is "three hundred ninety-seven million, seven hundred twenty-nine thousand, eighty".