408203505428 has 12 divisors (see below), whose sum is σ = 714364995540. Its totient is φ = 204099220992.

The previous prime is 408203505389. The next prime is 408203505467. The reversal of 408203505428 is 824505302804.

It is an interprime number because it is at equal distance from previous prime (408203505389) and next prime (408203505467).

It can be written as a sum of positive squares in 2 ways, for example, as 34506034564 + 373697470864 = 185758^2 + 611308^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243533 + ... + 935796.

It is an arithmetic number, because the mean of its divisors is an integer number (59530416295).

Almost surely, 2^408203505428 is an apocalyptic number.

It is an amenable number.

408203505428 is a deficient number, since it is larger than the sum of its proper divisors (306161490112).

408203505428 is a wasteful number, since it uses less digits than its factorization.

408203505428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265866 (or 1265864 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 41.

The spelling of 408203505428 in words is "four hundred eight billion, two hundred three million, five hundred five thousand, four hundred twenty-eight".