409561972 has 12 divisors (see below), whose sum is σ = 720131776. Its totient is φ = 203810040.

The previous prime is 409561963. The next prime is 409562017. The reversal of 409561972 is 279165904.

It is a happy number.

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, 241788 + ... + 243475.

Almost surely, 2^409561972 is an apocalyptic number.

It is an amenable number.

409561972 is a deficient number, since it is larger than the sum of its proper divisors (310569804).

409561972 is a wasteful number, since it uses less digits than its factorization.

409561972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485478 (or 485476 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 409561972 is about 20237.6375103420. The cubic root of 409561972 is about 742.6312295495.

The spelling of 409561972 in words is "four hundred nine million, five hundred sixty-one thousand, nine hundred seventy-two".