400030040 has 32 divisors (see below), whose sum is σ = 900661680. Its totient is φ = 159906432.

The previous prime is 400030039. The next prime is 400030063. The reversal of 400030040 is 40030004.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 92159 + ... + 96401.

Almost surely, 2^400030040 is an apocalyptic number.

400030040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400030040 is an abundant number, since it is smaller than the sum of its proper divisors (500631640).

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

400030040 is a wasteful number, since it uses less digits than its factorization.

400030040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6611 (or 6607 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 400030040 is about 20000.7509859005. The cubic root of 400030040 is about 736.8247439841.

Adding to 400030040 its reverse (40030004), we get a palindrome (440060044).

The spelling of 400030040 in words is "four hundred million, thirty thousand, forty".