72409804 has 6 divisors (see below), whose sum is σ = 126717164. Its totient is φ = 36204900.

The previous prime is 72409763. The next prime is 72409811. The reversal of 72409804 is 40890427.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 72409804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9051222 + ... + 9051229.

Almost surely, 2^72409804 is an apocalyptic number.

It is an amenable number.

72409804 is a deficient number, since it is larger than the sum of its proper divisors (54307360).

72409804 is a wasteful number, since it uses less digits than its factorization.

72409804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18102455 (or 18102453 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 72409804 is about 8509.3950431273. The cubic root of 72409804 is about 416.8045558205.

The spelling of 72409804 in words is "seventy-two million, four hundred nine thousand, eight hundred four".