396932990 has 32 divisors (see below), whose sum is σ = 776355840. Its totient is φ = 145562400.

The previous prime is 396932981. The next prime is 396932993. The reversal of 396932990 is 99239693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396932993) 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 15 ways as a sum of consecutive naturals, for example, 27806 + ... + 39585.

It is an arithmetic number, because the mean of its divisors is an integer number (24261120).

Almost surely, 2^396932990 is an apocalyptic number.

396932990 is a deficient number, since it is larger than the sum of its proper divisors (379422850).

396932990 is a wasteful number, since it uses less digits than its factorization.

396932990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67448.

The product of its (nonzero) digits is 708588, while the sum is 50.

The square root of 396932990 is about 19923.1772064598. The cubic root of 396932990 is about 734.9183058198.

The spelling of 396932990 in words is "three hundred ninety-six million, nine hundred thirty-two thousand, nine hundred ninety".