408748991 has 16 divisors (see below), whose sum is σ = 477031680. Its totient is φ = 342988800.

The previous prime is 408748943. The next prime is 408748999. The reversal of 408748991 is 199847804.

It is not a de Polignac number, because 408748991 - 2¹⁰ = 408747967 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 (408748999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104216 + ... + 108066.

It is an arithmetic number, because the mean of its divisors is an integer number (29814480).

Almost surely, 2^408748991 is an apocalyptic number.

408748991 is a deficient number, since it is larger than the sum of its proper divisors (68282689).

408748991 is a wasteful number, since it uses less digits than its factorization.

408748991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 408748991 is about 20217.5416655933. The cubic root of 408748991 is about 742.1395294404.

The spelling of 408748991 in words is "four hundred eight million, seven hundred forty-eight thousand, nine hundred ninety-one".