402134240 has 96 divisors (see below), whose sum is σ = 1006992000. Its totient is φ = 151331328.

The previous prime is 402134219. The next prime is 402134251. The reversal of 402134240 is 42431204.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543791 + ... + 544529.

It is an arithmetic number, because the mean of its divisors is an integer number (10489500).

Almost surely, 2^402134240 is an apocalyptic number.

402134240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402134240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (503496000).

402134240 is an abundant number, since it is smaller than the sum of its proper divisors (604857760).

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

402134240 is a wasteful number, since it uses less digits than its factorization.

402134240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 402134240 is about 20053.2850176723. The cubic root of 402134240 is about 738.1144105249.

Adding to 402134240 its reverse (42431204), we get a palindrome (444565444).

The spelling of 402134240 in words is "four hundred two million, one hundred thirty-four thousand, two hundred forty".