1530400491 has 6 divisors (see below), whose sum is σ = 2210578500. Its totient is φ = 1020266988.

The previous prime is 1530400489. The next prime is 1530400507. The reversal of 1530400491 is 1940040351.

1530400491 is a `hidden beast` number, since 1 + 530 + 40 + 0 + 4 + 91 = 666.

It is not a de Polignac number, because 1530400491 - 2¹ = 1530400489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1530402491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85022241 + ... + 85022258.

It is an arithmetic number, because the mean of its divisors is an integer number (368429750).

Almost surely, 2^1530400491 is an apocalyptic number.

1530400491 is a deficient number, since it is larger than the sum of its proper divisors (680178009).

1530400491 is a wasteful number, since it uses less digits than its factorization.

1530400491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170044505 (or 170044502 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1530400491 is about 39120.3334725051. Note that the first 3 decimals coincide. The cubic root of 1530400491 is about 1152.3958848985.

The spelling of 1530400491 in words is "one billion, five hundred thirty million, four hundred thousand, four hundred ninety-one".