74280891 has 4 divisors (see below), whose sum is σ = 99041192. Its totient is φ = 49520592.

The previous prime is 74280881. The next prime is 74280901. The reversal of 74280891 is 19808247.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (74280881) and next prime (74280901).

It is not a de Polignac number, because 74280891 - 2⁶ = 74280827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74280851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12380146 + ... + 12380151.

It is an arithmetic number, because the mean of its divisors is an integer number (24760298).

Almost surely, 2^74280891 is an apocalyptic number.

74280891 is a deficient number, since it is larger than the sum of its proper divisors (24760301).

74280891 is a wasteful number, since it uses less digits than its factorization.

74280891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24760300.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 74280891 is about 8618.6362610334. The cubic root of 74280891 is about 420.3641795955.

The spelling of 74280891 in words is "seventy-four million, two hundred eighty thousand, eight hundred ninety-one".