396429380 has 24 divisors (see below), whose sum is σ = 868698432. Its totient is φ = 151677152.

The previous prime is 396429379. The next prime is 396429401. The reversal of 396429380 is 83924693.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430442 + ... + 431361.

It is an arithmetic number, because the mean of its divisors is an integer number (36195768).

Almost surely, 2^396429380 is an apocalyptic number.

It is an amenable number.

396429380 is an abundant number, since it is smaller than the sum of its proper divisors (472269052).

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

396429380 is a wasteful number, since it uses less digits than its factorization.

396429380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861835 (or 861833 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 396429380 is about 19910.5343976499. The cubic root of 396429380 is about 734.6073642967.

The spelling of 396429380 in words is "three hundred ninety-six million, four hundred twenty-nine thousand, three hundred eighty".