396238690 has 16 divisors (see below), whose sum is σ = 725319360. Its totient is φ = 155808880.

The previous prime is 396238639. The next prime is 396238691. The reversal of 396238690 is 96832693.

It is a happy number.

It is a super-2 number, since 2×396238690² = 314010198905832200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 396238690.

It is not an unprimeable number, because it can be changed into a prime (396238691) 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 7 ways as a sum of consecutive naturals, for example, 335206 + ... + 336385.

It is an arithmetic number, because the mean of its divisors is an integer number (45332460).

Almost surely, 2^396238690 is an apocalyptic number.

396238690 is a deficient number, since it is larger than the sum of its proper divisors (329080670).

396238690 is a wasteful number, since it uses less digits than its factorization.

396238690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671657.

The product of its (nonzero) digits is 419904, while the sum is 46.

The square root of 396238690 is about 19905.7451505840. The cubic root of 396238690 is about 734.4895587454.

It can be divided in two parts, 396 and 238690, that added together give a triangular number (239086 = T₆₉₁).

The spelling of 396238690 in words is "three hundred ninety-six million, two hundred thirty-eight thousand, six hundred ninety".