408340497477 has 64 divisors (see below), whose sum is σ = 621227667456. Its totient is φ = 236377263360.

The previous prime is 408340497463. The next prime is 408340497491. The reversal of 408340497477 is 774794043804.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (408340497463) and next prime (408340497491).

It is not a de Polignac number, because 408340497477 - 2¹⁰ = 408340496453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408340497427) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 115577203 + ... + 115580735.

It is an arithmetic number, because the mean of its divisors is an integer number (9706682304).

Almost surely, 2^408340497477 is an apocalyptic number.

408340497477 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

408340497477 is a deficient number, since it is larger than the sum of its proper divisors (212887169979).

408340497477 is a wasteful number, since it uses less digits than its factorization.

408340497477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5370.

The product of its (nonzero) digits is 18966528, while the sum is 57.

The spelling of 408340497477 in words is "four hundred eight billion, three hundred forty million, four hundred ninety-seven thousand, four hundred seventy-seven".