248990805 has 36 divisors (see below), whose sum is σ = 502051212. Its totient is φ = 113823360.

The previous prime is 248990803. The next prime is 248990843. The reversal of 248990805 is 508099842.

248990805 is a `hidden beast` number, since 2 + 489 + 90 + 80 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 196196049 + 52794756 = 14007^2 + 7266^2 .

It is not a de Polignac number, because 248990805 - 2¹ = 248990803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (248990803) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 54256 + ... + 58665.

It is an arithmetic number, because the mean of its divisors is an integer number (13945867).

Almost surely, 2^248990805 is an apocalyptic number.

It is an amenable number.

248990805 is an abundant number, since it is smaller than the sum of its proper divisors (253060407).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

248990805 is a wasteful number, since it uses less digits than its factorization.

248990805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112946 (or 112936 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 248990805 is about 15779.4424806455. The cubic root of 248990805 is about 629.1117110799. Note that the first 3 decimals are identical.

The spelling of 248990805 in words is "two hundred forty-eight million, nine hundred ninety thousand, eight hundred five".