402500000 has 192 divisors, whose sum is σ = 1181246976. Its totient is φ = 132000000.

The previous prime is 402499943. The next prime is 402500003. The reversal of 402500000 is 5204.

It is a sliding number, since 402500000 = 2500000 + 400000000 and 1/2500000 + 1/400000000 = 0.000000402500000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402500003) 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 31 ways as a sum of consecutive naturals, for example, 17499989 + ... + 17500011.

It is an arithmetic number, because the mean of its divisors is an integer number (6152328).

Almost surely, 2^402500000 is an apocalyptic number.

402500000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (590623488).

402500000 is an abundant number, since it is smaller than the sum of its proper divisors (778746976).

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

402500000 is an frugal number, since it uses more digits than its factorization.

402500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 402500000 is about 20062.4026477389. The cubic root of 402500000 is about 738.3381259664.

Adding to 402500000 its reverse (5204), we get a palindrome (402505204).

It can be divided in two parts, 40 and 2500000, that multiplied together give a 8-th power (100000000 = 10⁸).

The spelling of 402500000 in words is "four hundred two million, five hundred thousand".