74563890 has 32 divisors (see below), whose sum is σ = 180328896. Its totient is φ = 19730880.

The previous prime is 74563889. The next prime is 74563943. The reversal of 74563890 is 9836547.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

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 in 15 ways as a sum of consecutive naturals, for example, 5557 + ... + 13416.

It is an arithmetic number, because the mean of its divisors is an integer number (5635278).

Almost surely, 2^74563890 is an apocalyptic number.

74563890 is an abundant number, since it is smaller than the sum of its proper divisors (105765006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74563890 is a wasteful number, since it uses less digits than its factorization.

74563890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19114.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 74563890 is about 8635.0385059941. The cubic root of 74563890 is about 420.8973444658.

The spelling of 74563890 in words is "seventy-four million, five hundred sixty-three thousand, eight hundred ninety".