491913430 has 32 divisors (see below), whose sum is σ = 897892128. Its totient is φ = 194016000.

The previous prime is 491913427. The next prime is 491913437. The reversal of 491913430 is 34319194.

It is a super-2 number, since 2×491913430² = 483957645228729800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491913437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284970 + ... + 286690.

It is an arithmetic number, because the mean of its divisors is an integer number (28059129).

Almost surely, 2^491913430 is an apocalyptic number.

491913430 is a deficient number, since it is larger than the sum of its proper divisors (405978698).

491913430 is a wasteful number, since it uses less digits than its factorization.

491913430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 491913430 is about 22179.1214884630. The cubic root of 491913430 is about 789.3983722599.

The spelling of 491913430 in words is "four hundred ninety-one million, nine hundred thirteen thousand, four hundred thirty".