397667340 has 384 divisors, whose sum is σ = 1532160000. Its totient is φ = 85349376.

The previous prime is 397667299. The next prime is 397667363. The reversal of 397667340 is 43766793.

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 127 ways as a sum of consecutive naturals, for example, 3519124 + ... + 3519236.

It is an arithmetic number, because the mean of its divisors is an integer number (3990000).

Almost surely, 2^397667340 is an apocalyptic number.

397667340 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 397667340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766080000).

397667340 is an abundant number, since it is smaller than the sum of its proper divisors (1134492660).

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

397667340 is a wasteful number, since it uses less digits than its factorization.

397667340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 45.

The square root of 397667340 is about 19941.5982308340. The cubic root of 397667340 is about 735.3712410298.

The spelling of 397667340 in words is "three hundred ninety-seven million, six hundred sixty-seven thousand, three hundred forty".