402942384 has 160 divisors (see below), whose sum is σ = 1256239040. Its totient is φ = 122923008.

The previous prime is 402942373. The next prime is 402942389. The reversal of 402942384 is 483249204.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402942389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 881484 + ... + 881940.

It is an arithmetic number, because the mean of its divisors is an integer number (7851494).

Almost surely, 2^402942384 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402942384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628119520).

402942384 is an abundant number, since it is smaller than the sum of its proper divisors (853296656).

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

402942384 is a wasteful number, since it uses less digits than its factorization.

402942384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 402942384 is about 20073.4248198956. The cubic root of 402942384 is about 738.6085271106.

The spelling of 402942384 in words is "four hundred two million, nine hundred forty-two thousand, three hundred eighty-four".