402638912 has 112 divisors (see below), whose sum is σ = 905329152. Its totient is φ = 176394240.

The previous prime is 402638911. The next prime is 402638917. The reversal of 402638912 is 219836204.

It is not an unprimeable number, because it can be changed into a prime (402638911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1727948 + ... + 1728180.

It is an arithmetic number, because the mean of its divisors is an integer number (8083296).

Almost surely, 2^402638912 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 402638912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (452664576).

402638912 is an abundant number, since it is smaller than the sum of its proper divisors (502690240).

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

402638912 is a wasteful number, since it uses less digits than its factorization.

402638912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 402638912 is about 20065.8643471942. The cubic root of 402638912 is about 738.4230553486.

The spelling of 402638912 in words is "four hundred two million, six hundred thirty-eight thousand, nine hundred twelve".