73509890 has 16 divisors (see below), whose sum is σ = 133490808. Its totient is φ = 29143296.

The previous prime is 73509871. The next prime is 73509901. The reversal of 73509890 is 9890537.

It can be written as a sum of positive squares in 4 ways, for example, as 16008001 + 57501889 = 4001^2 + 7583^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31397 + ... + 33656.

Almost surely, 2^73509890 is an apocalyptic number.

73509890 is a deficient number, since it is larger than the sum of its proper divisors (59980918).

73509890 is a wasteful number, since it uses less digits than its factorization.

73509890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65173.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 73509890 is about 8573.7908768525. The cubic root of 73509890 is about 418.9047236960.

The spelling of 73509890 in words is "seventy-three million, five hundred nine thousand, eight hundred ninety".