408728487 has 8 divisors (see below), whose sum is σ = 553905520. Its totient is φ = 268018560.

The previous prime is 408728477. The next prime is 408728503. The reversal of 408728487 is 784827804.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 408728487 - 2⁴ = 408728471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408728477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1116562 + ... + 1116927.

It is an arithmetic number, because the mean of its divisors is an integer number (69238190).

Almost surely, 2^408728487 is an apocalyptic number.

408728487 is a deficient number, since it is larger than the sum of its proper divisors (145177033).

408728487 is a wasteful number, since it uses less digits than its factorization.

408728487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233553.

The product of its (nonzero) digits is 802816, while the sum is 48.

The square root of 408728487 is about 20217.0345748332. The cubic root of 408728487 is about 742.1271199636.

The spelling of 408728487 in words is "four hundred eight million, seven hundred twenty-eight thousand, four hundred eighty-seven".