400024026 has 12 divisors (see below), whose sum is σ = 866718762. Its totient is φ = 133341336.

The previous prime is 400024021. The next prime is 400024039. The reversal of 400024026 is 620420004.

400024026 is a `hidden beast` number, since 400 + 0 + 240 + 26 = 666.

It can be written as a sum of positive squares in only one way, i.e., 327791025 + 72233001 = 18105^2 + 8499^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 22223557 = 400024026 / (4 + 0 + 0 + 0 + 2 + 4 + 0 + 2 + 6).

It is not an unprimeable number, because it can be changed into a prime (400024021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11111761 + ... + 11111796.

Almost surely, 2^400024026 is an apocalyptic number.

400024026 is an abundant number, since it is smaller than the sum of its proper divisors (466694736).

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

400024026 is a wasteful number, since it uses less digits than its factorization.

400024026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22223565 (or 22223562 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 400024026 is about 20000.6006409808. The cubic root of 400024026 is about 736.8210515229.

The spelling of 400024026 in words is "four hundred million, twenty-four thousand, twenty-six".