402667984 has 20 divisors (see below), whose sum is σ = 826062084. Its totient is φ = 189490688.

The previous prime is 402667981. The next prime is 402668009. The reversal of 402667984 is 489766204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 261533584 + 141134400 = 16172^2 + 11880^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402667981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739927 + ... + 740470.

Almost surely, 2^402667984 is an apocalyptic number.

It is an amenable number.

402667984 is an abundant number, since it is smaller than the sum of its proper divisors (423394100).

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

402667984 is a wasteful number, since it uses less digits than its factorization.

402667984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480422 (or 1480416 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 402667984 is about 20066.5887484644. The cubic root of 402667984 is about 738.4408272014.

It can be divided in two parts, 402667 and 984, that added together give a triangular number (403651 = T₈₉₈).

The spelling of 402667984 in words is "four hundred two million, six hundred sixty-seven thousand, nine hundred eighty-four".