400026040 has 16 divisors (see below), whose sum is σ = 900058680. Its totient is φ = 160010400.

The previous prime is 400026037. The next prime is 400026043. The reversal of 400026040 is 40620004.

It is an interprime number because it is at equal distance from previous prime (400026037) and next prime (400026043).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400026043) 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 3 ways as a sum of consecutive naturals, for example, 5000286 + ... + 5000365.

Almost surely, 2^400026040 is an apocalyptic number.

400026040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400026040 is an abundant number, since it is smaller than the sum of its proper divisors (500032640).

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

400026040 is a wasteful number, since it uses less digits than its factorization.

400026040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10000662 (or 10000658 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400026040 is about 20000.6509894053. The cubic root of 400026040 is about 736.8222880778.

Adding to 400026040 its reverse (40620004), we get a palindrome (440646044).

The spelling of 400026040 in words is "four hundred million, twenty-six thousand, forty".