402041250 has 120 divisors (see below), whose sum is σ = 1172671500. Its totient is φ = 98928000.

The previous prime is 402041221. The next prime is 402041251. The reversal of 402041250 is 52140204.

It can be written as a sum of positive squares in 10 ways, for example, as 165096801 + 236944449 = 12849^2 + 15393^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (402041251) 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 59 ways as a sum of consecutive naturals, for example, 144876 + ... + 147624.

Almost surely, 2^402041250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402041250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (586335750).

402041250 is an abundant number, since it is smaller than the sum of its proper divisors (770630250).

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

402041250 is a wasteful number, since it uses less digits than its factorization.

402041250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2790 (or 2772 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 402041250 is about 20050.9663108789. The cubic root of 402041250 is about 738.0575119875.

Adding to 402041250 its reverse (52140204), we get a palindrome (454181454).

The spelling of 402041250 in words is "four hundred two million, forty-one thousand, two hundred fifty".