402134420 has 12 divisors (see below), whose sum is σ = 844482324. Its totient is φ = 160853760.

The previous prime is 402134413. The next prime is 402134431. The reversal of 402134420 is 24431204.

It can be written as a sum of positive squares in 2 ways, for example, as 86787856 + 315346564 = 9316^2 + 17758^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 20106721 = 402134420 / (4 + 0 + 2 + 1 + 3 + 4 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 402134392 and 402134401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10053341 + ... + 10053380.

It is an arithmetic number, because the mean of its divisors is an integer number (70373527).

Almost surely, 2^402134420 is an apocalyptic number.

It is an amenable number.

402134420 is an abundant number, since it is smaller than the sum of its proper divisors (442347904).

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

402134420 is a wasteful number, since it uses less digits than its factorization.

402134420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20106730 (or 20106728 counting only the distinct ones).

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

The square root of 402134420 is about 20053.2895057145. The cubic root of 402134420 is about 738.1145206544.

Adding to 402134420 its reverse (24431204), we get a palindrome (426565624).

The spelling of 402134420 in words is "four hundred two million, one hundred thirty-four thousand, four hundred twenty".