397748070 has 80 divisors (see below), whose sum is σ = 1072621440. Its totient is φ = 105757056.

The previous prime is 397748059. The next prime is 397748077. The reversal of 397748070 is 70847793.

397748070 is a `hidden beast` number, since 39 + 77 + 480 + 70 = 666.

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 (397748077) 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 39 ways as a sum of consecutive naturals, for example, 460459 + ... + 461321.

It is an arithmetic number, because the mean of its divisors is an integer number (13407768).

Almost surely, 2^397748070 is an apocalyptic number.

397748070 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 397748070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536310720).

397748070 is an abundant number, since it is smaller than the sum of its proper divisors (674873370).

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

397748070 is a wasteful number, since it uses less digits than its factorization.

397748070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451 (or 1442 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 397748070 is about 19943.6222888421. The cubic root of 397748070 is about 735.4209999593.

The spelling of 397748070 in words is "three hundred ninety-seven million, seven hundred forty-eight thousand, seventy".