402002500 has 45 divisors (see below), whose sum is σ = 881296801. Its totient is φ = 160400000.

The previous prime is 402002453. The next prime is 402002543. The reversal of 402002500 is 5200204.

It is a happy number.

The square root of 402002500 is 20050.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 56340036 + 345662464 = 7506^2 + 18592^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1002300 + ... + 1002700.

Almost surely, 2^402002500 is an apocalyptic number.

402002500 is the 20050-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402002500

402002500 is an abundant number, since it is smaller than the sum of its proper divisors (479294301).

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

402002500 is an frugal number, since it uses more digits than its factorization.

402002500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826 (or 408 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The cubic root of 402002500 is about 738.0337991243.

Adding to 402002500 its reverse (5200204), we get a palindrome (407202704).

The spelling of 402002500 in words is "four hundred two million, two thousand, five hundred".