402020434 has 8 divisors (see below), whose sum is σ = 603848880. Its totient is φ = 200737476.

The previous prime is 402020419. The next prime is 402020441. The reversal of 402020434 is 434020204.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 134524 + ... + 137479.

It is an arithmetic number, because the mean of its divisors is an integer number (75481110).

Almost surely, 2^402020434 is an apocalyptic number.

402020434 is a deficient number, since it is larger than the sum of its proper divisors (201828446).

402020434 is a wasteful number, since it uses less digits than its factorization.

402020434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272744.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 402020434 is about 20050.4472269324. The cubic root of 402020434 is about 738.0447739328.

Adding to 402020434 its reverse (434020204), we get a palindrome (836040638).

The spelling of 402020434 in words is "four hundred two million, twenty thousand, four hundred thirty-four".