990857463 has 8 divisors (see below), whose sum is σ = 1321771776. Its totient is φ = 660257400.

The previous prime is 990857449. The next prime is 990857489. The reversal of 990857463 is 364758099.

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

It is not a de Polignac number, because 990857463 - 2¹³ = 990849271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990857443) 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, 71103 + ... + 83888.

It is an arithmetic number, because the mean of its divisors is an integer number (165221472).

Almost surely, 2^990857463 is an apocalyptic number.

990857463 is a deficient number, since it is larger than the sum of its proper divisors (330914313).

990857463 is a wasteful number, since it uses less digits than its factorization.

990857463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157125.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 990857463 is about 31477.8884774694. Note that the first 3 decimals coincide. The cubic root of 990857463 is about 996.9431528737.

The spelling of 990857463 in words is "nine hundred ninety million, eight hundred fifty-seven thousand, four hundred sixty-three".