396877489 has 12 divisors (see below), whose sum is σ = 416574900. Its totient is φ = 378075104.

The previous prime is 396877471. The next prime is 396877501. The reversal of 396877489 is 984778693.

It can be written as a sum of positive squares in 2 ways, for example, as 121881600 + 274995889 = 11040^2 + 16583^2 .

It is not a de Polignac number, because 396877489 - 2⁵ = 396877457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396877889) 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 11 ways as a sum of consecutive naturals, for example, 140907 + ... + 143695.

It is an arithmetic number, because the mean of its divisors is an integer number (34714575).

Almost surely, 2^396877489 is an apocalyptic number.

It is an amenable number.

396877489 is a deficient number, since it is larger than the sum of its proper divisors (19697411).

396877489 is a wasteful number, since it uses less digits than its factorization.

396877489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104 (or 3081 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 61.

The square root of 396877489 is about 19921.7842825385. The cubic root of 396877489 is about 734.8840510017.

The spelling of 396877489 in words is "three hundred ninety-six million, eight hundred seventy-seven thousand, four hundred eighty-nine".