400006250 has 96 divisors (see below), whose sum is σ = 881943552. Its totient is φ = 133200000.

The previous prime is 400006247. The next prime is 400006267. The reversal of 400006250 is 52600004.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1793639 + ... + 1793861.

It is an arithmetic number, because the mean of its divisors is an integer number (9186912).

Almost surely, 2^400006250 is an apocalyptic number.

400006250 is an abundant number, since it is smaller than the sum of its proper divisors (481937302).

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

400006250 is an equidigital number, since it uses as much as digits as its factorization.

400006250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 400006250 is about 20000.1562493897. The cubic root of 400006250 is about 736.8101372409.

Adding to 400006250 its reverse (52600004), we get a palindrome (452606254).

The spelling of 400006250 in words is "four hundred million, six thousand, two hundred fifty".