402043420 has 24 divisors (see below), whose sum is σ = 888728400. Its totient is φ = 152353152.

The previous prime is 402043399. The next prime is 402043429. The reversal of 402043420 is 24340204.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402043429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528625 + ... + 529384.

It is an arithmetic number, because the mean of its divisors is an integer number (37030350).

Almost surely, 2^402043420 is an apocalyptic number.

It is an amenable number.

402043420 is an abundant number, since it is smaller than the sum of its proper divisors (486684980).

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

402043420 is a wasteful number, since it uses less digits than its factorization.

402043420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058037 (or 1058035 counting only the distinct ones).

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

The square root of 402043420 is about 20051.0204229111. The cubic root of 402043420 is about 738.0588398628.

Adding to 402043420 its reverse (24340204), we get a palindrome (426383624).

The spelling of 402043420 in words is "four hundred two million, forty-three thousand, four hundred twenty".