408492269956 has 9 divisors (see below), whose sum is σ = 714863709399. Its totient is φ = 204245495844.

The previous prime is 408492269953. The next prime is 408492269959. The reversal of 408492269956 is 659962294804.

The square root of 408492269956 is 639134.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (408492269953) and next prime (408492269959).

It is a super-3 number, since 3×408492269956³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408492269953) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1118485 + ... + 1438051.

Almost surely, 2^408492269956 is an apocalyptic number.

408492269956 is the 639134-th square number.

It is an amenable number.

408492269956 is a deficient number, since it is larger than the sum of its proper divisors (306371439443).

408492269956 is an frugal number, since it uses more digits than its factorization.

408492269956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639138 (or 319569 counting only the distinct ones).

The product of its (nonzero) digits is 67184640, while the sum is 64.

Multiplying 408492269956 by its sum of digits (64), we get a square (26143505277184 = 5113072²).

The spelling of 408492269956 in words is "four hundred eight billion, four hundred ninety-two million, two hundred sixty-nine thousand, nine hundred fifty-six".