1463640431 has 8 divisors (see below), whose sum is σ = 1597227984. Its totient is φ = 1330141120.

The previous prime is 1463640379. The next prime is 1463640461. The reversal of 1463640431 is 1340463641.

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

It is a de Polignac number, because none of the positive numbers 2^k-1463640431 is a prime.

It is a super-2 number, since 2×1463640431² = 4284486622515731522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1463640461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15401 + ... + 56253.

It is an arithmetic number, because the mean of its divisors is an integer number (199653498).

Almost surely, 2^1463640431 is an apocalyptic number.

1463640431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1463640431 is a deficient number, since it is larger than the sum of its proper divisors (133587553).

1463640431 is a wasteful number, since it uses less digits than its factorization.

1463640431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44121.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 1463640431 is about 38257.5539076925. The cubic root of 1463640431 is about 1135.3893056681.

The spelling of 1463640431 in words is "one billion, four hundred sixty-three million, six hundred forty thousand, four hundred thirty-one".