391242748 has 24 divisors (see below), whose sum is σ = 748353872. Its totient is φ = 177876864.

The previous prime is 391242739. The next prime is 391242749. The reversal of 391242748 is 847242193.

It is a self number, because there is not a number n which added to its sum of digits gives 391242748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391242749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52665 + ... + 59632.

Almost surely, 2^391242748 is an apocalyptic number.

It is an amenable number.

391242748 is a deficient number, since it is larger than the sum of its proper divisors (357111124).

391242748 is a wasteful number, since it uses less digits than its factorization.

391242748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112381 (or 112379 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 391242748 is about 19779.8571278966. The cubic root of 391242748 is about 731.3895769021.

The spelling of 391242748 in words is "three hundred ninety-one million, two hundred forty-two thousand, seven hundred forty-eight".