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249992090 = 2524999209
BaseRepresentation
bin11101110011010…
…01001110011010
3122102101220200022
432321221032122
51002444221330
640450110442
76123616625
oct1671511632
9572356608
10249992090
11119128837
126b87b422
133ca3bc1a
14252b6dbc
1516e31ae5
hexee6939a

249992090 has 8 divisors (see below), whose sum is σ = 449985780. Its totient is φ = 99996832.

The previous prime is 249992087. The next prime is 249992111. The reversal of 249992090 is 90299942.

It can be written as a sum of positive squares in 2 ways, for example, as 244265641 + 5726449 = 15629^2 + 2393^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12499595 + ... + 12499614.

Almost surely, 2249992090 is an apocalyptic number.

249992090 is a deficient number, since it is larger than the sum of its proper divisors (199993690).

249992090 is a wasteful number, since it uses less digits than its factorization.

249992090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24999216.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 249992090 is about 15811.1381627004. The cubic root of 249992090 is about 629.9538808937.

The spelling of 249992090 in words is "two hundred forty-nine million, nine hundred ninety-two thousand, ninety".

Divisors: 1 2 5 10 24999209 49998418 124996045 249992090