397437390 has 192 divisors, whose sum is σ = 1280987136. Its totient is φ = 83414016.

The previous prime is 397437379. The next prime is 397437451. The reversal of 397437390 is 93734793.

It is a super-3 number, since 3×397437390³ (a number of 27 digits) contains 333 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 460099 + ... + 460961.

It is an arithmetic number, because the mean of its divisors is an integer number (6671808).

Almost surely, 2^397437390 is an apocalyptic number.

397437390 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 397437390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (640493568).

397437390 is an abundant number, since it is smaller than the sum of its proper divisors (883549746).

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

397437390 is a wasteful number, since it uses less digits than its factorization.

397437390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 428652, while the sum is 45.

The square root of 397437390 is about 19935.8318110883. The cubic root of 397437390 is about 735.2294715959.

The spelling of 397437390 in words is "three hundred ninety-seven million, four hundred thirty-seven thousand, three hundred ninety".