407887840 has 24 divisors (see below), whose sum is σ = 963635400. Its totient is φ = 163155072.

The previous prime is 407887807. The next prime is 407887849. The reversal of 407887840 is 48788704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (407887849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1274490 + ... + 1274809.

It is an arithmetic number, because the mean of its divisors is an integer number (40151475).

Almost surely, 2^407887840 is an apocalyptic number.

407887840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

407887840 is an abundant number, since it is smaller than the sum of its proper divisors (555747560).

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

407887840 is a wasteful number, since it uses less digits than its factorization.

407887840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549314 (or 2549306 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 46.

The square root of 407887840 is about 20196.2333121798. The cubic root of 407887840 is about 741.6179839835.

The spelling of 407887840 in words is "four hundred seven million, eight hundred eighty-seven thousand, eight hundred forty".