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1305249804 = 223236256939
BaseRepresentation
bin100110111001100…
…1000100000001100
310100222001120010100
41031303020200030
510133120443204
6333304011100
744226304005
oct11563104014
93328046110
101305249804
1160a863551
12305160a90
1317a555681
14c54ca1ac
15798caa39
hex4dcc880c

1305249804 has 18 divisors (see below), whose sum is σ = 3299381540. Its totient is φ = 435083256.

The previous prime is 1305249733. The next prime is 1305249811. The reversal of 1305249804 is 4089425031.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×13052498043 (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 36256939 = 1305249804 / (1 + 3 + 0 + 5 + 2 + 4 + 9 + 8 + 0 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18128434 + ... + 18128505.

Almost surely, 21305249804 is an apocalyptic number.

It is an amenable number.

1305249804 is an abundant number, since it is smaller than the sum of its proper divisors (1994131736).

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

1305249804 is a wasteful number, since it uses less digits than its factorization.

1305249804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36256949 (or 36256944 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1305249804 is about 36128.2410864410. The cubic root of 1305249804 is about 1092.8600377653.

The spelling of 1305249804 in words is "one billion, three hundred five million, two hundred forty-nine thousand, eight hundred four".

Divisors: 1 2 3 4 6 9 12 18 36 36256939 72513878 108770817 145027756 217541634 326312451 435083268 652624902 1305249804