400384225 has 12 divisors (see below), whose sum is σ = 497248060. Its totient is φ = 319809600.

The previous prime is 400384213. The next prime is 400384241. The reversal of 400384225 is 522483004.

It can be written as a sum of positive squares in 6 ways, for example, as 17164449 + 383219776 = 4143^2 + 19576^2 .

It is not a de Polignac number, because 400384225 - 2¹⁹ = 399859937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400384193 and 400384202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4411 + ... + 28639.

Almost surely, 2^400384225 is an apocalyptic number.

It is an amenable number.

400384225 is a deficient number, since it is larger than the sum of its proper divisors (96863835).

400384225 is a wasteful number, since it uses less digits than its factorization.

400384225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24900 (or 24895 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 400384225 is about 20009.6033194064. The cubic root of 400384225 is about 737.0421403980.

The spelling of 400384225 in words is "four hundred million, three hundred eighty-four thousand, two hundred twenty-five".