402019124 has 12 divisors (see below), whose sum is σ = 757651524. Its totient is φ = 185547264.

The previous prime is 402019099. The next prime is 402019181. The reversal of 402019124 is 421910204.

It can be written as a sum of positive squares in 2 ways, for example, as 215150224 + 186868900 = 14668^2 + 13670^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 402019124.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3865517 + ... + 3865620.

It is an arithmetic number, because the mean of its divisors is an integer number (63137627).

Almost surely, 2^402019124 is an apocalyptic number.

It is an amenable number.

402019124 is a deficient number, since it is larger than the sum of its proper divisors (355632400).

402019124 is a wasteful number, since it uses less digits than its factorization.

402019124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7731154 (or 7731152 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 402019124 is about 20050.4145593053. The cubic root of 402019124 is about 738.0439722822.

Adding to 402019124 its reverse (421910204), we get a palindrome (823929328).

The spelling of 402019124 in words is "four hundred two million, nineteen thousand, one hundred twenty-four".