397122750 has 112 divisors (see below), whose sum is σ = 1115122320. Its totient is φ = 105850800.

The previous prime is 397122727. The next prime is 397122757. The reversal of 397122750 is 57221793.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397122757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 181161 + ... + 183339.

Almost surely, 2^397122750 is an apocalyptic number.

397122750 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 397122750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557561160).

397122750 is an abundant number, since it is smaller than the sum of its proper divisors (717999570).

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

397122750 is an equidigital number, since it uses as much as digits as its factorization.

397122750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214 (or 2189 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 397122750 is about 19927.9389300550. The cubic root of 397122750 is about 735.0354002108.

The spelling of 397122750 in words is "three hundred ninety-seven million, one hundred twenty-two thousand, seven hundred fifty".