391488074 has 8 divisors (see below), whose sum is σ = 589415940. Its totient is φ = 195016096.

The previous prime is 391488067. The next prime is 391488077. The reversal of 391488074 is 470884193.

It can be written as a sum of positive squares in 2 ways, for example, as 385847449 + 5640625 = 19643^2 + 2375^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (391488077) 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, 363299 + ... + 364374.

Almost surely, 2^391488074 is an apocalyptic number.

391488074 is a deficient number, since it is larger than the sum of its proper divisors (197927866).

391488074 is a wasteful number, since it uses less digits than its factorization.

391488074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727944.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 391488074 is about 19786.0575658720. The cubic root of 391488074 is about 731.5424158493.

The spelling of 391488074 in words is "three hundred ninety-one million, four hundred eighty-eight thousand, seventy-four".